Question

G=qd+hd, solve for d

Answer 1

Remember distributive property
ab+ac=a(b+c)
undistribute d
G=d(q+h)
divide both sides by (q+h)
$\frac{G}{q+h} =d$

Answer 2

Let's solve for d:
g=qd+hd
Step 1: Flip the equation.
dh+dq=g
Step 2: Factor out variable d.
d(h+q)=g
Step 3: Divide both sides by by h+q
d(h+q)/h+q=g/h+q
Answer:
d=g/h+q