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(x-(90-x))+74=90
We move all terms to the left:
(x-(90-x))+74-(90)=0
We add all the numbers together, and all the variables
(x-(-1x+90))+74-90=0
We add all the numbers together, and all the variables
(x-(-1x+90))-16=0
We calculate terms in parentheses: +(x-(-1x+90)), so:We get rid of parentheses
x-(-1x+90)
We get rid of parentheses
x+1x-90
We add all the numbers together, and all the variables
2x-90
Back to the equation:
+(2x-90)
2x-90-16=0
We add all the numbers together, and all the variables
2x-106=0
We move all terms containing x to the left, all other terms to the right
2x=106
x=106/2
x=53
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