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30-8x=-7(x-5)
We move all terms to the left:
30-8x-(-7(x-5))=0
We calculate terms in parentheses: -(-7(x-5)), so:We get rid of parentheses
-7(x-5)
We multiply parentheses
-7x+35
Back to the equation:
-(-7x+35)
-8x+7x-35+30=0
We add all the numbers together, and all the variables
-1x-5=0
We move all terms containing x to the left, all other terms to the right
-x=5
x=5/-1
x=-5
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