(x+21)+(2x+18)=(15-5x)-(x-60)

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Solution for (x+21)+(2x+18)=(15-5x)-(x-60) equation: 



(x+21)+(2x+18)=(15-5x)-(x-60)

We move all terms to the left:

(x+21)+(2x+18)-((15-5x)-(x-60))=0

We add all the numbers together, and all the variables

(x+21)+(2x+18)-((-5x+15)-(x-60))=0

We get rid of parentheses

x+2x-((-5x+15)-(x-60))+21+18=0



We calculate terms in parentheses: -((-5x+15)-(x-60)), so:

(-5x+15)-(x-60)

We get rid of parentheses

-5x-x+15+60

We add all the numbers together, and all the variables

-6x+75

Back to the equation:

-(-6x+75)



We add all the numbers together, and all the variables

3x-(-6x+75)+39=0

We get rid of parentheses

3x+6x-75+39=0

We add all the numbers together, and all the variables

9x-36=0

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

9x=36

x=36/9

x=4

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