3x+-6x=18+-21

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Solution for 3x+-6x=18+-21 equation: 



3x+-6x=18+-21

We move all terms to the left:

3x+-6x-(18+-21)=0

We add all the numbers together, and all the variables

3x-6x+-(-3)=0

We add all the numbers together, and all the variables

-3x+3=0

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

-3x=-3

x=-3/-3

x=1

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