6x-15-x=-7x+21

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Solution for 6x-15-x=-7x+21 equation: 



6x-15-x=-7x+21

We move all terms to the left:

6x-15-x-(-7x+21)=0

We add all the numbers together, and all the variables

5x-(-7x+21)-15=0

We get rid of parentheses

5x+7x-21-15=0

We add all the numbers together, and all the variables

12x-36=0

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

12x=36

x=36/12

x=3

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