5k + (-7) = 13 what does k =

k = 4

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Equality Properties

Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtract Property of Equality

Step-by-step explanation:

Step 1: Define

5k + (-7) = 13

Step 2: Solve for k

Simplify equation:                             5k - 7 = 13Addition Property of Equality:          5k - 7 + 7 = 13 + 7Simplify equation:                             5k = 20Division Property of Equality:           5k/5 = 20/5Simplify equation:                             k = 4

Step 3: Check

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

Substitute in k:                    5(4) + (-7) = 13Multiply:                               20 + (-7) = 13Add:                                     13 = 13

Here we see that 13 does indeed equal 13.

∴ k = 4 is the solution to the equation.

The answer is 49/16 or 3 1/16