90+x=90-x

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Solution for 90+x=90-x equation: 



90+x=90-x

We move all terms to the left:

90+x-(90-x)=0

We add all the numbers together, and all the variables

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

We get rid of parentheses

x+1x-90+90=0

We add all the numbers together, and all the variables

2x=0

x=0/2

x=0

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