10x+12-x-(10(12-x)+x)=54

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Solution for 10x+12-x-(10(12-x)+x)=54 equation: 



10x+12-x-(10(12-x)+x)=54

We move all terms to the left:

10x+12-x-(10(12-x)+x)-(54)=0

We add all the numbers together, and all the variables

10x-x-(10(-1x+12)+x)+12-54=0

We add all the numbers together, and all the variables

9x-(10(-1x+12)+x)-42=0



We calculate terms in parentheses: -(10(-1x+12)+x), so:

10(-1x+12)+x

We add all the numbers together, and all the variables

x+10(-1x+12)

We multiply parentheses

x-10x+120

We add all the numbers together, and all the variables

-9x+120

Back to the equation:

-(-9x+120)



We get rid of parentheses

9x+9x-120-42=0

We add all the numbers together, and all the variables

18x-162=0

We move all terms containing x to the left, all other terms to the right

18x=162

x=162/18

x=9

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