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skelet666 [1.2K]
3 years ago
8

Solve 3x−5 = 9. (3 points) Question 3 options: 1) x = −3 2) x = 2 3) x = 7 4) x = 8

Mathematics
2 answers:
Maru [420]3 years ago
7 0

Answer:

x=7

Step-by-step explanation:

the other answer here is technically right but i know what you mean because i took the test and you forgot the ^ between 3 and x-5

bezimeni [28]3 years ago
5 0

Answer:

x = 14/3

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Equality Properties

Step-by-step explanation:

<u>Step 1: Define equation</u>

3x - 5 = 9

<u>Step 2: Solve for </u><em><u>x</u></em>

  1. Add 5 to both sides:                    3x = 14
  2. Divide 3 on both sides:                x = 14/3

<u>Step 3: Check</u>

<em>Plug in x into the original equation to verify it's a solution.</em>

  1. Substitute in <em>x</em>:                    3(14/3) - 5 = 9
  2. Multiply:                               14 - 5 = 9
  3. Subtract:                              9 = 9

Here we see that 9 does indeed equal 9.

∴ x = 14/3 is a solution of the equation.

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