Question

When x is divided by 3,the remainder is z.In terms of z, which of the following could be equal to x ?

a. z-3
b. 3-z
c. 3z
d. 6+z
e. 9+2z

please answer and explain

Answer 1

You know that if the remainder is zero, x is a multiple of 3.

But, there is a remainder of z, so add that in.

Only one of the choices is a multiple of 3, with an extra z