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-3x+4=-2x+3
-3x+4-4=-2x+3-4
-3x=-2x-1
-3x+2x=-2x-1+2x
-x=-1
x=1
2) 7x+5-2=8+4-2
7x+3=10
7x+3-3=10-3
7x=7
x=1
3) 5-(2x-4)=9-(2+3x)
-2x+9=-3x+7
-2x=-3x-2
-2x+3x=-3x-2+3x
x=-2
4) (3x+1)-(x+3)=3(x+1)
2x-2=3x+3
2x-2+2=3x+3+2
2x=3x+5
2x-3x=3x+5-3x
-x=5
x=-5