x+(x+48)=90

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Solution for x+(x+48)=90 equation: 



x+(x+48)=90

We move all terms to the left:

x+(x+48)-(90)=0

We get rid of parentheses

x+x+48-90=0

We add all the numbers together, and all the variables

2x-42=0

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

2x=42

x=42/2

x=21

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