3x+4=5x+20

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Solution for 3x+4=5x+20 equation: 



3x+4=5x+20

We move all terms to the left:

3x+4-(5x+20)=0

We get rid of parentheses

3x-5x-20+4=0

We add all the numbers together, and all the variables

-2x-16=0

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

-2x=16

x=16/-2

x=-8

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