Question

Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this.
10x + 11y = -26.5

20x + 5y = -27.5

Answer 1

multiply the top by negative 2 than solve

Answer 2

i got where i have to muliply by -2

Answer 3

like this
-2(10x + 11y) = -2(-26.5)

Answer 4

than subtract the -20x from 20x and solve for y

Answer 5

then add both equations

Answer 6

i did that to, i got -17 for y but confused from there

Answer 7

use the -17 in one of the equations and solve for x

Answer 8

thats where i get lost

Answer 9

20x+5(-17)=-27.5 now solve

Answer 10

y=-1.5 and x=-1