30x-15x=x-40

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Solution for 30x-15x=x-40 equation: 



30x-15x=x-40

We move all terms to the left:

30x-15x-(x-40)=0

We add all the numbers together, and all the variables

15x-(x-40)=0

We get rid of parentheses

15x-x+40=0

We add all the numbers together, and all the variables

14x+40=0

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

14x=-40

x=-40/14

x=-2+6/7

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