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105=7(x-4)
We move all terms to the left:
105-(7(x-4))=0
We calculate terms in parentheses: -(7(x-4)), so:We get rid of parentheses
7(x-4)
We multiply parentheses
7x-28
Back to the equation:
-(7x-28)
-7x+28+105=0
We add all the numbers together, and all the variables
-7x+133=0
We move all terms containing x to the left, all other terms to the right
-7x=-133
x=-133/-7
x=+19
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