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15x-20=12-4x
We move all terms to the left:
15x-20-(12-4x)=0
We add all the numbers together, and all the variables
15x-(-4x+12)-20=0
We get rid of parentheses
15x+4x-12-20=0
We add all the numbers together, and all the variables
19x-32=0
We move all terms containing x to the left, all other terms to the right
19x=32
x=32/19
x=1+13/19
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