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7x-5(7x-2)=220
We move all terms to the left:
7x-5(7x-2)-(220)=0
We multiply parentheses
7x-35x+10-220=0
We add all the numbers together, and all the variables
-28x-210=0
We move all terms containing x to the left, all other terms to the right
-28x=210
x=210/-28
x=-7+1/2
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