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PtichkaEL [24]
3 years ago
10

7x - 3 = 39 sloving linear equations

Mathematics
2 answers:
xxMikexx [17]3 years ago
6 0
7x - 3 = 39
first add three to both sides
7x = 42
next divide both sides by 7
x = 6
Lostsunrise [7]3 years ago
5 0

Answer:

x = 6

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

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtract Property of Equality<u> </u>

<u>Algebra I</u>

  • Terms/Coefficients

Step-by-step explanation:

<u>Step 1: Define</u>

7x - 3 = 39

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

  1. [Addition Property of Equality] Add 3 on both sides:                                   7x = 42
  2. [Division Property of Equality] Divide 7 on both sides:                                x = 6

<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>:                                                                                                7(6) - 3 = 39
  2. Multiply:                                                                                                           42 - 3 = 39
  3. Subtract:                                                                                                          39 = 39

Here we see that 39 does indeed equal 39.

∴ x = 6 is the solution to the equation.

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