Question

Solve for x. 7x−9<12

Answer 1

x < 3

Explanation:

7x-9 = 12

take -9 on the other side to get

7x =12+9

7x = 21

x=3

x < 3

Answer 2

x < 3

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

1. Brackets
2. Parenthesis
3. Exponents
4. Multiplication
5. Division
6. Addition
7. Subtraction

• Left to Right

Algebra I

• Equality Properties

Explanation:

Step 1: Define

7x - 9 < 12

Step 2: Solve for x

1. Add 9 to both sides: 7x < 21
2. Divide 7 on both sides: x < 3

Here we see that any value x smaller than 3 would work as a solution to the inequality.