The total income is represented by: 5r - 2c - 3p
The rent is $500 (r = 500)
The cable bill is $80 (c = 80)
The phone bill is $40 (p = 40)
Replacing these data into the equation, we get:
Income = 5(500) - 2(80) - 3(40)
Income = 2500 - 160 - 120
Income = $2220