Question

Solve fort.
-t = 9(t – 10)
t=

Answer 1

Explanation:

-t=9(t-10)

-t=9t-90

90=9t+t

90=10t

90/10=t

9=t

Answer 2

t = 9

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

Distributive Property

Equality Properties

• Multiplication Property of Equality
• Division Property of Equality
• Addition Property of Equality
• Subtraction Property of Equality

Algebra I

• Terms/Coefficients

Explanation:

Step 1: Define

Identify

-t = 9(t - 10)

Step 2: Solve for t

1. [Distributive Property] Distribute 9: -t = 9t - 90
2. [Subtraction Property of Equality] Subtract 9t on both sides; -10t = -90
3. [Division Property of Equality] Divide -10 on both sides: t = 9