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8=40+4x
We move all terms to the left:
8-(40+4x)=0
We add all the numbers together, and all the variables
-(4x+40)+8=0
We get rid of parentheses
-4x-40+8=0
We add all the numbers together, and all the variables
-4x-32=0
We move all terms containing x to the left, all other terms to the right
-4x=32
x=32/-4
x=-8
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