Question

3. SHIPPING The Lone Star Shipping
Company charges $14 plus $2 a pound
to ship an overnight package. Discount
Shipping Company charges $20 plus
$1.50 a pound to ship an overnight
package. For what weight is the charge
the same for the two companies?

Answer 1

Answer: 14 + 2p = 20 + 1.5p   =   12 pounds.

How I Got My Answer:

14 + 2p = 20 + 1.5p

    -1.5p         - 1.5p

-----------------------------

14 + 0.5p = 20

-14              -14

---------------------

0.5p = 6

0.5p/0.5 = 6/0.5

------------------------

p = 12

12 pounds.