Question

solve for d.
-9d + 12d = 15
d =

Explanation:

Step1: Combine like - terms

Combine the terms with the variable $d$ on the left - hand side of the equation. $-9d+12d=( - 9 + 12)d=3d$. So the equation becomes $3d = 15$.

Step2: Isolate the variable $d$

Divide both sides of the equation $3d = 15$ by 3. $\frac{3d}{3}=\frac{15}{3}$.

Answer:

$5$