How do I do this? it's hard for me to understand word problems

Question

asked Jan 24, 2019 140k views

2 Answers

John Reid · Answer 1 · 2019-01-29T09:43:40+0000

a) Rainbow phone: c=100+6x

Cellular phone: c=80+10x

b) make the equations equal to each other:

100+6x=80+10x

20=4x

5=x

5 GB over

c)if x=6

Rainbow: 100+(6 x 6)= $136

Cellular: 80+(10 x 6)=$140

Therefore rainbow will save them the most money