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30=2x+5(x+13)
We move all terms to the left:
30-(2x+5(x+13))=0
We calculate terms in parentheses: -(2x+5(x+13)), so:We get rid of parentheses
2x+5(x+13)
We multiply parentheses
2x+5x+65
We add all the numbers together, and all the variables
7x+65
Back to the equation:
-(7x+65)
-7x-65+30=0
We add all the numbers together, and all the variables
-7x-35=0
We move all terms containing x to the left, all other terms to the right
-7x=35
x=35/-7
x=-5
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