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5(-3x+7)-7=133
We move all terms to the left:
5(-3x+7)-7-(133)=0
We add all the numbers together, and all the variables
5(-3x+7)-140=0
We multiply parentheses
-15x+35-140=0
We add all the numbers together, and all the variables
-15x-105=0
We move all terms containing x to the left, all other terms to the right
-15x=105
x=105/-15
x=-7
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