(5x-15)-2x=(2x+21)-2x

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Solution for (5x-15)-2x=(2x+21)-2x equation: 



(5x-15)-2x=(2x+21)-2x

We move all terms to the left:

(5x-15)-2x-((2x+21)-2x)=0

We add all the numbers together, and all the variables

-2x+(5x-15)-((2x+21)-2x)=0

We get rid of parentheses

-2x+5x-((2x+21)-2x)-15=0



We calculate terms in parentheses: -((2x+21)-2x), so:

(2x+21)-2x

We add all the numbers together, and all the variables

-2x+(2x+21)

We get rid of parentheses

-2x+2x+21

We add all the numbers together, and all the variables

21

Back to the equation:

-(21)



We add all the numbers together, and all the variables

3x-36=0

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

3x=36

x=36/3

x=12

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