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-215=-5(8+5x)
We move all terms to the left:
-215-(-5(8+5x))=0
We add all the numbers together, and all the variables
-(-5(5x+8))-215=0
We calculate terms in parentheses: -(-5(5x+8)), so:We get rid of parentheses
-5(5x+8)
We multiply parentheses
-25x-40
Back to the equation:
-(-25x-40)
25x+40-215=0
We add all the numbers together, and all the variables
25x-175=0
We move all terms containing x to the left, all other terms to the right
25x=175
x=175/25
x=7
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