Question

Solve this systems of linear equations.separate the x- and y-values with a comma 18x+7y=-89 9x-9y=18

Answer 1

Explanation:

18x+7y=-89 equation1

9x-9y=18 equation2

multiplying equation 2 by 2

2(9x-9y=18) 18x-18y=36 equation 3

subtacting equation 1 and 3

18x-18x+7y+18y=-89-36

25y=125

y=5

putting the values of y in equation1

18x+7(5)=-89

18x+35=-89

18x=-89-35

18x=-124

x=-6.8