Question

Three times a number plus 12 minus 5 times the same number is 22

Answer 1

1. a number is represented by "x"

3x + 12 - 5x = 22
12 - 2x = 22
-2x = 10
x = -5


2. (45) + (45) + (45 + 6x) = 303
job 1, 2, 3 equals total for the day

135 + 6x = 303
6x = 168
x = 28

the plumbers hourly rate is $28/hr

Answer 2

Three times (3 ·) a number (x) plus (+) 12 minus (-) 5 times (·) the same number (x) is (=) 22

3x + 12 - 5x = 22 Combine like terms (3x and -5x)
-2x + 12 = 22 Subtract 12 from both sides
-2x = 10 Divide both sides by -2
x = -5