3x+20+2x+40=90

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Solution for 3x+20+2x+40=90 equation: 



3x+20+2x+40=90

We move all terms to the left:

3x+20+2x+40-(90)=0

We add all the numbers together, and all the variables

5x-30=0

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

5x=30

x=30/5

x=6

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