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18-4x+7-3x=-2(x+5)
We move all terms to the left:
18-4x+7-3x-(-2(x+5))=0
We add all the numbers together, and all the variables
-7x-(-2(x+5))+25=0
We calculate terms in parentheses: -(-2(x+5)), so:We get rid of parentheses
-2(x+5)
We multiply parentheses
-2x-10
Back to the equation:
-(-2x-10)
-7x+2x+10+25=0
We add all the numbers together, and all the variables
-5x+35=0
We move all terms containing x to the left, all other terms to the right
-5x=-35
x=-35/-5
x=+7
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