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

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

3< x< 5

step-by-step explanation:

|x - 4| < 1

there are two solutions, one positive and one negative.   remember to flip the inequality when taking the negative solution

x-4 < 1       x-4 > -1

add 4 to each side

x-4+4 < 1+4       x-4+4 > -1+4

x< 5                 x> 3

3< x< 5

understand that i don't know the answers

will someone answer his question