Answer:
x+2=3
collect like terms
x=3-2
x=1
x-12=x+30
x-x=30-12
=18
2(x+6)=2x+12
open bracket
2x+12=2x-12
2x-2x=-12+12
=0
3(x-2)=3x-2
3x-6=3x-2
3x-3x=-2+6
=4
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