4x-40=50+x

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Solution for 4x-40=50+x equation: 



4x-40=50+x

We move all terms to the left:

4x-40-(50+x)=0

We add all the numbers together, and all the variables

4x-(x+50)-40=0

We get rid of parentheses

4x-x-50-40=0

We add all the numbers together, and all the variables

3x-90=0

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

3x=90

x=90/3

x=30

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