Question

2x + 4y = 12
2x + y = 3

2x + 3y = 8
-x + y = -4

4x + 2y = 12
4x + 2y = 4

2x + 3y = 4
6x + 9y = 12
How do i solve them

Answer 1

by the simultaneous way look i'll solve u one as an example & u do the others
on the same Pattern...........so let's take no.2

2x+3y=8 in the simultaneous way the value of (X) or (y)
-x+y=-4 must be equal in the 2 equations to be cancelled
therefore we will multiply equation 2 time 2
(-x+y=-4) X 2 = -2x+2y=-8
so......2x+3y=8
-2x+2y=-8 so by adding the 2 equations we get that

5y=0 so y=0
so x=4

Answer 2

thankz

Answer 3

wlcm :)