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3x+13=7x+94
We move all terms to the left:
3x+13-(7x+94)=0
We get rid of parentheses
3x-7x-94+13=0
We add all the numbers together, and all the variables
-4x-81=0
We move all terms containing x to the left, all other terms to the right
-4x=81
x=81/-4
x=-20+1/4
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