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x+2x-2=4-x
3x+x=4+2
4x=6 /:4
x= 6/4 = 1 1/2
b) -3(4-x)=4-2x
-12+3x=4-2x
5x=16 /:5
x= 16/5 = 3 1/5
x+2x-2=4-x
4x=6/:4
x=6/4
-3(4-x)=4-2x
-12+3x=4-2x
5x=16/5
x=16/5