Answer :
Make an equation
Y = 2 + 0.12x
22.04 = 2 + 0.12x
0.12x = 20.04, x = 167
He was billed for 167 minutes
Y = 2 + 0.12x
22.04 = 2 + 0.12x
0.12x = 20.04, x = 167
He was billed for 167 minutes