4x=3*10-x

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Solution for 4x=3*10-x equation: 



4x=3*10-x

We move all terms to the left:

4x-(3*10-x)=0

We add all the numbers together, and all the variables

4x-(-1x+30)=0

We get rid of parentheses

4x+1x-30=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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