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35x+12=40+42
We move all terms to the left:
35x+12-(40+42)=0
We add all the numbers together, and all the variables
35x+12-82=0
We add all the numbers together, and all the variables
35x-70=0
We move all terms containing x to the left, all other terms to the right
35x=70
x=70/35
x=2
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