(x+20)+(x+30)=(77-x)

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Solution for (x+20)+(x+30)=(77-x) equation: 



(x+20)+(x+30)=(77-x)

We move all terms to the left:

(x+20)+(x+30)-((77-x))=0

We add all the numbers together, and all the variables

(x+20)+(x+30)-((-1x+77))=0

We get rid of parentheses

x+x-((-1x+77))+20+30=0



We calculate terms in parentheses: -((-1x+77)), so:

(-1x+77)

We get rid of parentheses

-1x+77

Back to the equation:

-(-1x+77)



We add all the numbers together, and all the variables

2x-(-1x+77)+50=0

We get rid of parentheses

2x+1x-77+50=0

We add all the numbers together, and all the variables

3x-27=0

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

3x=27

x=27/3

x=9

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