Question

f) 7x-3y=6
2x-y=3

g)x+2y=7
4x-y=10

Answer 1

f) 7x-3y=6 (×2)
2x-y=3 (×7)

14x-6y=12
14x-7y=21
-11y= 33
y=33/-11
y=-3
2x-3=3
x=3

g)x+2y=7 (×2)
4x-y=10(×4)

2x+4y=14
16x-4y=40
18x=54
x=3

3+2y=7
y=4/2
y=2