(12-(-3))/3=x

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Solution for (12-(-3))/3=x equation: 



(12-(-3))/3=x

We move all terms to the left:

(12-(-3))/3-(x)=0

We add all the numbers together, and all the variables

-1x+(12-(-3))/3=0

We multiply all the terms by the denominator


-1x*3+(12-(-3))=0



We calculate terms in parentheses: +(12-(-3)), so:

12-(-3)

We add all the numbers together, and all the variables

15

Back to the equation:

+(15)



Wy multiply elements

-3x+15=0

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

-3x=-15

x=-15/-3

x=+5

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