21(2-x)+12x=-3

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Solution for 21(2-x)+12x=-3 equation: 



21(2-x)+12x=-3

We move all terms to the left:

21(2-x)+12x-(-3)=0

We add all the numbers together, and all the variables

21(-1x+2)+12x-(-3)=0

We add all the numbers together, and all the variables

12x+21(-1x+2)+3=0

We multiply parentheses

12x-21x+42+3=0

We add all the numbers together, and all the variables

-9x+45=0

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

-9x=-45

x=-45/-9

x=+5

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