Math

posted by .

0.05x+0.10y=1.30
x+y=19

• Math -

multiply the first by 20 to get rid of those nasty decimals
x + 2y = 26
subtract the second equation from that
y = 7
plug back into the 2nd
x+7=19
x=12

x=12, y=7

Similar Questions

1. Pre-Calculus

The monthly revenue acheived by selling x boxes of candy is calculated to be x(5-0.05x)dollars. The wholesale cost of each box of candy is \$1.50. How many boxes must be sold each month to achieve a profit of at least \$60. Can someone …
2. Algebra 2

"My husband's age," remarked a lady the other day, "is represented by the figures of my own age reversed. He is my senior, and the difference between our ages is one-eleventh of their sum." 10x + y = husband's age 10y + x = wife's …
3. Math

0.05x +0.10y=1.30 x+y=19
4. math

7 – 4(x + y) + 2(x – 3y) A 7 – 2x – 7y B.7 – 2x – 10y(*) C.7 + 2x – 7y d.7 + 2x – 10y i think its be im not aure can some one check my ansswer
5. math help

5x+10y +15z-15x+10y-5z+5x-10y-5z / (5x+10y+15z)-(15x+10y-5z)+(5x-10y-5z) a. 1/3 b. 1 c. x+2y+z / x-2y+3z d. x-2y-z / x+2y-3z e. x-2y-z / x+2y+z my answer is none of above, is - 1/3, I didn't know I done it wrong or the question is …
6. math (last question #5) @Damon

5. (2y – 1)(4y – 3) (1 point) –2y + 3 8y^2 – 10y – 3 8y^2 – 10y + 3 8y^2 – 2y + 3 i did the rest (#1 and #3) but im stuck on #5, can u help Damon?
7. Math

Use the initial condition y(0)=4 and step size h=.25, calculate the backward Euler on [0,1] for the ODE y'=10y-10y^2. Solve the ODE exactly and compute the errors at t=1.
8. Math

1. Write an equation in point-slope form for the line through the given point with the given slope. (-10,-6);m=-5/8 A. y-6=-5/8(x-10) B. y-6=-5/8(x+10) C. y+6=-5/8(x+10) D. y+10=-5/8(x+6) 2. The table below shows the height of a plant …
9. algebra

What is the equation of the given line in standard form?