(x+30)+x=90

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Solution for (x+30)+x=90 equation: 



(x+30)+x=90

We move all terms to the left:

(x+30)+x-(90)=0

We add all the numbers together, and all the variables

x+(x+30)-90=0

We get rid of parentheses

x+x+30-90=0

We add all the numbers together, and all the variables

2x-60=0

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

2x=60

x=60/2

x=30

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