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3 years ago

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:

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

Algebra I

Terms/Coefficients

Step-by-step explanation:

Step 1: Define

7x - 3 = 39

Step 2: Solve for x

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

Step 3: Check

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

Substitute in x: 7(6) - 3 = 39
Multiply: 42 - 3 = 39
Subtract: 39 = 39

Here we see that 39 does indeed equal 39.

∴ x = 6 is the solution to the equation.

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