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25=-5(2x+1)
We move all terms to the left:
25-(-5(2x+1))=0
We calculate terms in parentheses: -(-5(2x+1)), so:We get rid of parentheses
-5(2x+1)
We multiply parentheses
-10x-5
Back to the equation:
-(-10x-5)
10x+5+25=0
We add all the numbers together, and all the variables
10x+30=0
We move all terms containing x to the left, all other terms to the right
10x=-30
x=-30/10
x=-3
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