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2x-3=x+1
x-3=1
x=4
2x-6=3x+3
2x-3x=3+6
-1x=9/:(-1)
x=-9
c)6z+8:½=4
6z+4=4
6z=4-4
6z=0/:6
z=0
2x-3x=6+3
-x=9
x=-9
1/3y - 1/3=5y
1/3y - 5y=1/3
4 1/3y=1/3 / 4 1/3
y=1 5/9
6z+16=4
6z=- 16 + 4
6z=-12 / 6
z=2