4x+12=-3

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Solution for 4x+12=-3 equation: 



4x+12=-3

We move all terms to the left:

4x+12-(-3)=0

We add all the numbers together, and all the variables

4x+15=0

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

4x=-15

x=-15/4

x=-3+3/4

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