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-47(21x+7)=-40
We move all terms to the left:
-47(21x+7)-(-40)=0
We add all the numbers together, and all the variables
-47(21x+7)+40=0
We multiply parentheses
-987x-329+40=0
We add all the numbers together, and all the variables
-987x-289=0
We move all terms containing x to the left, all other terms to the right
-987x=289
x=289/-987
x=-289/987
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