1. 2x-y=23x+y=8 2x-y=2y=2x-2
3x+y=83x+2x-2=8 5x-10=0x=10/5
x=2
2x-y=2
2*2-y=2y=2 2. 4x+y=33x-y=11 4x+y=3
y=-4x+3
3x-y-11
3x-(-4x+3)=117x-14=0x=14/7
x=2
4*2+y=3 y=-5 3. 4x-3y=34x-7y=-5 4x-3y=3y=-(-4x+3)/3
4x-7y=-54x-7*(-(-4x+3)/3)=-5-16/3x+12=0x=12/(16/3)
x=2.25
4x-3y=3
4*(2.25)-3y=36-3y=0 y=6/3y=2