help me PLS IM BAD AT THIS

Question

Under her cell phone plan, Paisley pays a flat cost of $60 per month and $3 per gigabyte. She wants to keep her bill under $75 per month. Write and solve an inequality which can be used to determine gg, the number of gigabytes Paisley can use while staying within her budget.

Answer 1

Cost = C(gg)

= 60+3gg < 75

3gg < 75-60 = 15

gg < 5