(4x)+(x-15)=90

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Solution for (4x)+(x-15)=90 equation: 



(4x)+(x-15)=90

We move all terms to the left:

(4x)+(x-15)-(90)=0

We get rid of parentheses

4x+x-15-90=0

We add all the numbers together, and all the variables

5x-105=0

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

5x=105

x=105/5

x=21

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