Question

Which lists all the integer Solutions of the equation |x| = 10?

A. -10 only

B. 0 and 10

C. 10 only

D. -10 and 10

Answer 1

Modulus (x) = 10

Modulus means we just take size of x neglecting the positive or negative sign.

But this how you solve modulus equation.

x = 10 This is the first part, which is the positive part.

Also for the negative part:

-x = 10 Divide both sides by -1.

x = -10

So the solutions are 10 and -10. (D)