Question

zasha spent $6 on packages of gum.How many more packages of gum that cost $1.20 each can she buy if she has a $20 bill

Answer 1

You have to make an inequality:
1.2x + 6 ≤ 20
       - 6     - 6     isolate x

1.2x ≤ 14
÷1.2     ÷1.2   isolate x

x ≤  11.666

Since you can't buy 2/3 of a pack, she can only buy 11 pieces of gum.

Hope this helps!