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4x-6=6
4x=6+6
4x=12
x=12/4
x=3
......................................
2(2x-3)=6 x=3
2(2(3)-3)=6
2(6-3)=6
2(3)=6
6=6
4x-x=6 + 6
3x = 12 2[2(4)-3] = 6 + 4
x= 12/ 3 2[8- 3] = 10
x= 4 2[5] = 10
10= 10