3x+20+2x+10=90

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Solution for 3x+20+2x+10=90 equation: 



3x+20+2x+10=90

We move all terms to the left:

3x+20+2x+10-(90)=0

We add all the numbers together, and all the variables

5x-60=0

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

5x=60

x=60/5

x=12

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