5x+18=90-3x

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Solution for 5x+18=90-3x equation: 



5x+18=90-3x

We move all terms to the left:

5x+18-(90-3x)=0

We add all the numbers together, and all the variables

5x-(-3x+90)+18=0

We get rid of parentheses

5x+3x-90+18=0

We add all the numbers together, and all the variables

8x-72=0

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

8x=72

x=72/8

x=9

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