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-189=4x-3(-4+15)
We move all terms to the left:
-189-(4x-3(-4+15))=0
We add all the numbers together, and all the variables
-(4x-311)-189=0
We get rid of parentheses
-4x+311-189=0
We add all the numbers together, and all the variables
-4x+122=0
We move all terms containing x to the left, all other terms to the right
-4x=-122
x=-122/-4
x=30+1/2
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