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10=2(5-x)+5(3-x)
We move all terms to the left:
10-(2(5-x)+5(3-x))=0
We add all the numbers together, and all the variables
-(2(-1x+5)+5(-1x+3))+10=0
We calculate terms in parentheses: -(2(-1x+5)+5(-1x+3)), so:We get rid of parentheses
2(-1x+5)+5(-1x+3)
We multiply parentheses
-2x-5x+10+15
We add all the numbers together, and all the variables
-7x+25
Back to the equation:
-(-7x+25)
7x-25+10=0
We add all the numbers together, and all the variables
7x-15=0
We move all terms containing x to the left, all other terms to the right
7x=15
x=15/7
x=2+1/7
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