Question

Solve the simultaneous equations. 3x-4y=15 ; x+y=-2​

Answer 1

Answer:

3x-4y=15

x+y=-2

multiply by 4 in equation 2 we get

4x+4y=8

3x-4y=15

4x+4y=-8

7x=7

x=1

we put in eq 2 we get

1+y=-8

y=-7