12+3=d

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Solution for 12+3=d equation:


12+3=d

We simplify the equation to the form, which is simple to understand 
12+3=d

We move all terms containing d to the left and all other terms to the right. 
-1d=-12-3

We simplify left and right side of the equation. 
-1d=-15

We divide both sides of the equation by -01 to get d. 
d=15

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