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(-7x+12)=(-8+48)
We move all terms to the left:
(-7x+12)-((-8+48))=0
We add all the numbers together, and all the variables
(-7x+12)-(40)=0
We add all the numbers together, and all the variables
(-7x+12)-40=0
We get rid of parentheses
-7x+12-40=0
We add all the numbers together, and all the variables
-7x-28=0
We move all terms containing x to the left, all other terms to the right
-7x=28
x=28/-7
x=-4
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