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4x-1=15
4x=16
x=4
3x-5:2+3=3x+5:6 /x6
9x-15+18=3x+5
9x+3=3x+5
6x=2
x=1/3
3(2x-7)-(7x-13)=-10
6x-21-7x+13=-10
-x-8=-10
-x=-2
x=2
-2(-27-3x)=-3(2x-10)
54+6x=-6x+30
12x=-24
x=-2