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-3x-49=87+x
We move all terms to the left:
-3x-49-(87+x)=0
We add all the numbers together, and all the variables
-3x-(x+87)-49=0
We get rid of parentheses
-3x-x-87-49=0
We add all the numbers together, and all the variables
-4x-136=0
We move all terms containing x to the left, all other terms to the right
-4x=136
x=136/-4
x=-34
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