# MATH, ALGEBRA

cAN SOMEONE JUST SHOW ME HOW TO GET THE EQUATION IN ORDER TO SOLVE IT MYSELF. i'LL APPRECIATED.

bUSINESS AND FINANCE. The Randolphs used 12 more gal of fuel oil in October than in September and twice as much oil in November as in September. If they used 132gal for the 3months , how much was used during each month?

Let x = the gallons of fuel they used in Sept. So, 12 + x is gallons used in Oct, and 2x is gallons used in November. Then just add them all!!

Let O = gallons used in Oct.
let S = gallons used in Sept.
let N = gallons used in Nov.
==============================
They used 12 more gallong of fuel oil in Oct than Sept; therefore, if we add 12 to Sept we will have the use in Oct.
O = S+12

They used twice as much oil in Nov as in Sept; therefore, if we multiply the use in Sept by 2 we will get Nov use.
N = 2S

The total is 132 gallongs.
N + O + S = 32.

Three equations. Three unknowns.

Hint: Take the total equation (the last one) and substitute values for O and N and solve for S. I think S should be 30 gallons. Check my thinking. Check my work.

Obviously, I didn't hit the 1 for the last equation. It should be
N + O + S = 132

My fingers aren't as nimble as they were at one time.

how did you get the gallons for each month? to come out right

1. 👍 0
2. 👎 0
3. 👁 76

## Similar Questions

1. ### differential equations

Solve the following equation explicitly by expanding up to order x5, the following 2nd order diff equation. y''(x) = (1 + x^2)*y(x) pls show working y =f(x)

asked by zac on November 29, 2011
2. ### maths

Solve the following 2nd order differential equation explicitly by expanding up to order x5, y''(x) = (1 + x^2)*y(x) pls show working y =f(x)

asked by ryan on November 30, 2011
3. ### maths

Solve the following 2nd order differential equation explicitly by expanding up to order x5, y''(x) = (1 + x^2)*y(x) pls show working y =f(x)

asked by ryan j on November 30, 2011
4. ### differential equations

Consider the 2nd order differential equation: x''(t)=-x-A(x^2-1)x'(t) x(0)= 0.5 x'0)= 0 ''= 2nd order,'= 1st order where A is a positive constant.As the value of A increases this equation becomes increasingly stiff. Convert this

asked by Rikki on November 16, 2011
5. ### TO DRWLS/MATH HELP PLEASE

How do i solve inequalitites with three variables. I still can't figure it outplease help. x+y=1 y-z=-3 2x+3y+z=1 THE ANSWERS ARE X=3,Y=-2,Z=1 i KNOW THE ANSWERS I JUST DON'T KNOW HOW THE BOOK GOT THE ANSWERS . i 'VE TRIED MANY

asked by Jasmine202005 on October 22, 2006
6. ### Algebra

Please help me ASAP! 1. What is the solution to 45 - (-60)? Show your work. 2. Order the following integers from least to greatest: |-4|, 5, -10, 7, 0 3. Alan buys 3 dozen lightbulbs. After changing the lightbulbs in his house, he

asked by Anna P. on March 4, 2019
7. ### Algebra

I have some problems that I am having trouble with and I have some that need checking please. Thanks! Solve the equation. 4. (x+7/4)=2(x-1/6) Find all the value(s) of x that make thedenominator(s) zero. Then solve the equation. 6.

asked by Soly on August 21, 2007
8. ### Math

I need help with these three problems. They are on a Study Guide and I need some refreshing up of how to do them. 17. Solve the equation using the zero product property... -8n(5n+3) 19. Solve the equation by factoring 5z^2-2z-3=0

asked by Amy on May 27, 2009
9. ### Math

I need help with these three problems. They are on a Study Guide and I need some refreshing up of how to do them. 17. Solve the equation using the zero product property... -8n(5n+3) 19. Solve the equation by factoring 5z^2-2z-3=0

asked by Amy on May 26, 2009
10. ### math

I need help with these three problems. They are on a Study Guide and I need some refreshing up of how to do them. 17. Solve the equation using the zero product property... -8n(5n+3) 19. Solve the equation by factoring 5z^2-2z-3=0

asked by Amy on May 26, 2009
11. ### MATH

Write a two-step equation that needs the steps of addition then multiplication in order to be solved, and then solve it. Show your work.

asked by leya on May 24, 2012

More Similar Questions