(-15+10x)+(8x-21)=180

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Solution for (-15+10x)+(8x-21)=180 equation: 



(-15+10x)+(8x-21)=180

We move all terms to the left:

(-15+10x)+(8x-21)-(180)=0

We add all the numbers together, and all the variables

(10x-15)+(8x-21)-180=0

We get rid of parentheses

10x+8x-15-21-180=0

We add all the numbers together, and all the variables

18x-216=0

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

18x=216

x=216/18

x=12

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