Ok I am confused with these problems:
Solving for X and Y using substitution:
1. 2x+y=4
3x-y=6
2. 3x+15y=3
2x-5y=-28
3. 4x-5y=0
8x-10y+15
Solving for X and Y using linear addition:
4.5x-7y=2
3x=4y
5.10x+10y=40-5x
9x+2y=32-6y
6. 2x=8y+24
3x+5y=2