390+4x=550-4x

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Solution for 390+4x=550-4x equation: 



390+4x=550-4x

We move all terms to the left:

390+4x-(550-4x)=0

We add all the numbers together, and all the variables

4x-(-4x+550)+390=0

We get rid of parentheses

4x+4x-550+390=0

We add all the numbers together, and all the variables

8x-160=0

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

8x=160

x=160/8

x=20

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