Question

$3x + 8y = 6 \\ 6x + 7y = 9$

Answer 1

3x+8y=6 6x+7y=9

multiply by 2

6x+16y=12

subtract from equation 2

9y=3
y=1/3

3x+8/3=6
3x=6-8/3
3x=10/3
x=10/9