Question

1/2(2h-4)=20 I really don't know how to do this.

Answer 1

Answer:

$\frac{1}{2} (2h - 4) = 20 \\ 2h - 4 = 20 \times 2 \\ 2h = 40 + 4 \\ h = \frac{44}{2} \\ h = 22 \: ans.$