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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

-9x-(-7x-21)=0

We get rid of parentheses

-9x+7x+21=0

We add all the numbers together, and all the variables

-2x+21=0

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

-2x=-21

x=-21/-2

x=10+1/2

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