x+(20+4x)=90

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Solution for x+(20+4x)=90 equation: 



x+(20+4x)=90

We move all terms to the left:

x+(20+4x)-(90)=0

We add all the numbers together, and all the variables

x+(4x+20)-90=0

We get rid of parentheses

x+4x+20-90=0

We add all the numbers together, and all the variables

5x-70=0

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

5x=70

x=70/5

x=14

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