30+x=4x-15

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Solution for 30+x=4x-15 equation: 



30+x=4x-15

We move all terms to the left:

30+x-(4x-15)=0

We get rid of parentheses

x-4x+15+30=0

We add all the numbers together, and all the variables

-3x+45=0

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

-3x=-45

x=-45/-3

x=+15

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