Question

for cellular phone service , Vera pays $32 a month , plus $0.75 for each minute over the allowed minutes in her plan . Vera received a bill for $47 last month . for how many minutes did she use her phone beyond the allowed minutes ?

Answer 1

32 + 0.75x = 47
0.75x = 47 - 32
0.75x = 15
x = 15 / 0.75
x = 20 <=== 20 minutes