Thursday

July 31, 2014

July 31, 2014

Posted by **alex** on Monday, March 7, 2011 at 8:17pm.

3x-2y= 8

sovle using substituion

- math -
**jai**, Monday, March 7, 2011 at 8:41pm(1) x + 5y = -3

(2) 3x - 2y = 8

substitution method: we first choose one of the equation, and express one of the variables in terms of the other variable,, here let's choose equation (1), and express x in terms of y:

x + 5y = -3

x = -3 - 5y

now, we substitute this to equation (2), and we solve for y:

3x - 2y = 8

3(-3 - 5y) - 2y = 8

-9 - 15y -2y = 8

-17y = 17

y = -1

substituting this back to either equations to get x (let's choose (1)):

x = -3 - 5y

x = -3 -5(-1)

x = -3 + 5

x = 2

hope this helps~ :)

**Related Questions**

Math - Can someone help me solve the following problems using the substituion ...

Algebra - What is the answer to 7x+2y=16 and -21x-6y=24 using the substituion ...

Algebra - 1,Sovle using the substitution method. Show your work. If the system ...

Substituion MATH - 1) -x+10y=60 -4x+16y=32 2) -1/2x - 1/4y=3 1/3x+1/6y=2

Algebra - Sovle using the elimination method. Show your work. If the system has...

math - how do i sovle this equation. x/5 = 12/15

Math Help - Sovle w^2-13w+42=0 I get -6,-7 is this correct????

math - sovle the linear equation -8.3=x+6.1 Thank you

math (algerba 1) - how would you sovle this? multiply: (a + 5) (a - 5)

math - sovle the following equation 8/x-1=9/(x)(x+2) i know the answer is -1,7 ...