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(2x+8)70=80
We move all terms to the left:
(2x+8)70-(80)=0
We multiply parentheses
140x+560-80=0
We add all the numbers together, and all the variables
140x+480=0
We move all terms containing x to the left, all other terms to the right
140x=-480
x=-480/140
x=-3+3/7
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