-3x + 40 = -23

A) -21
B)5.6
C)21
D)-32.3

C) 21

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Equality Properties

Step-by-step explanation:

Step 1: Define

-3x + 40 = -23

Step 2: Solve for x

Step 3: Check

Plug in x into the original equation to verify it's a solution.

Here we see that -23 does indeed equal -23.

∴ x = 21 is the solution to the equation.

i can't see the picture : /