(2x+21)+(3x+4)=90

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Solution for (2x+21)+(3x+4)=90 equation: 



(2x+21)+(3x+4)=90

We move all terms to the left:

(2x+21)+(3x+4)-(90)=0

We get rid of parentheses

2x+3x+21+4-90=0

We add all the numbers together, and all the variables

5x-65=0

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

5x=65

x=65/5

x=13

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