x-4+3x+21=6x-13

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Solution for x-4+3x+21=6x-13 equation: 



x-4+3x+21=6x-13

We move all terms to the left:

x-4+3x+21-(6x-13)=0

We add all the numbers together, and all the variables

4x-(6x-13)+17=0

We get rid of parentheses

4x-6x+13+17=0

We add all the numbers together, and all the variables

-2x+30=0

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

-2x=-30

x=-30/-2

x=+15

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