1) 4x+3y=5, x=3+y
4(3+y)+3y=5
12+4y+3y=5
7y=-7
y=-1
x=3-1=2
2) x=7+y, 5x-3y=1
5(7+y)-3y=1
35+5y-3y=1
35+2y=1
2y=1-35
y= -17
x=7-17=-10
3) 6x+5y=6, y=-2-2x
6x+5(-2-2x)=6
6x-10-10x=6
-10-4x=6
-4x=6+10
x=-4
y=-2-2*(-4)=6
1) 4x+3y=5, x=3+y
4(3+y)+3y=5
12+4y+3y=5
7y=-7
y=-1
x=3-1=2
2) x=7+y, 5x-3y=1
5(7+y)-3y=1
35+5y-3y=1
35+2y=1
2y=1-35
y= -17
x=7-17=-10
3) 6x+5y=6, y=-2-2x
6x+5(-2-2x)=6
6x-10-10x=6
-10-4x=6
-4x=6+10
x=-4
y=-2-2*(-4)=6