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25=-5(a-2)
We move all terms to the left:
25-(-5(a-2))=0
We calculate terms in parentheses: -(-5(a-2)), so:We get rid of parentheses
-5(a-2)
We multiply parentheses
-5a+10
Back to the equation:
-(-5a+10)
5a-10+25=0
We add all the numbers together, and all the variables
5a+15=0
We move all terms containing a to the left, all other terms to the right
5a=-15
a=-15/5
a=-3
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