Question

1 1/2d-9=12 can you help explain how to do this

Answer 1

Answer:

d =14

Step-by-step explanation:

$1\frac{1}{2} d -9 =12$

$\frac{3}{2} d = 12+ 9$

$\frac{3}{2} d =21$

$d = 21 : \frac{3}{2}$

$d = 14$