Question

If 3 times a number minus 2 equals 13, what is the number?

a. 4
b. 6
c. 5
d. 2

Answer 1

We set up an equation: 3*? -2= 13
⇒ 3*?= 13+2 (inverse operation)
⇒ 3*?= 15
⇒ ?= 15/3 (inverse operation)
⇒ ?= 5

The correct answer is c. 5.