5x+4+21=90

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Solution for 5x+4+21=90 equation: 



5x+4+21=90

We move all terms to the left:

5x+4+21-(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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