2x+30=90-x

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Solution for 2x+30=90-x equation: 



2x+30=90-x

We move all terms to the left:

2x+30-(90-x)=0

We add all the numbers together, and all the variables

2x-(-1x+90)+30=0

We get rid of parentheses

2x+1x-90+30=0

We add all the numbers together, and all the variables

3x-60=0

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

3x=60

x=60/3

x=20

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