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10-18=x+9(2+x)
We move all terms to the left:
10-18-(x+9(2+x))=0
We add all the numbers together, and all the variables
-(x+9(x+2))+10-18=0
We add all the numbers together, and all the variables
-(x+9(x+2))-8=0
We calculate terms in parentheses: -(x+9(x+2)), so:We get rid of parentheses
x+9(x+2)
We multiply parentheses
x+9x+18
We add all the numbers together, and all the variables
10x+18
Back to the equation:
-(10x+18)
-10x-18-8=0
We add all the numbers together, and all the variables
-10x-26=0
We move all terms containing x to the left, all other terms to the right
-10x=26
x=26/-10
x=-2+3/5
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