Question

10) -4x + 9 y = 9
x-3y=-6​

Answer 1

y = 5

x = 9

Explanation:

multiple the second equation by 4 then add both equations up

4×(x -3y = -6 ) ➡ 4x - 12y = -24

4x -12y - 4x +9y = 9 - 24 ➡ -3y = -15

y = 5 use this value to find x

x - 3×5 = -6

x = -6 + 15

x = 9