Question

Solve the system using elimination:
1 3x+3y=27
x-37=-11

2 4x-7y=3
x-7y=-15

3 2x+3y=9
x+5y=8

4 3x+2y=17
2x+5y=26

Answer 1

1- multiply bottom equation by -3

3x+3y=27
-3x+111= 33

111+3y=60
3y=60-111
3y= -51
y= -17

Replace y in first equation with -17
3x+3(-17)= 27
3x-51=27
3x=27+51
x=26

Here, rest of them in the pic..