Solving the Equation: 3n + 4(3.60 - 2n) = 7.80
A Step-by-Step Guide to Solving Linear Equations

When faced with equations in algebra, clarity and systematic problem-solving are key. Today, weโ€™ll break down how to solve the equation:
3n + 4(3.60 - 2n) = 7.80, step-by-step, to help you understand the process of simplifying and isolating variables.


Understanding the Context

Understanding the Equation

The equation is:

3n + 4(3.60 - 2n) = 7.80

This involves distributive property and combining like terms โ€” essential skills in solving linear equations.

Key Insights


Step 1: Distribute the 4

Distribute 4 across the terms inside the parentheses:

> 3n + 4 ร— 3.60 โˆ’ 4 ร— 2n = 7.80

3n + 14.40 โˆ’ 8n = 7.80


Final Thoughts

Step 2: Combine Like Terms

Combine the terms with n:

> (3n โˆ’ 8n) + 14.40 = 7.80
โˆ’5n + 14.40 = 7.80


Step 3: Isolate the Variable Term

Subtract 14.40 from both sides:

> โˆ’5n = 7.80 โˆ’ 14.40
โˆ’5n = โˆ’6.60


Step 4: Solve for n

Divide both sides by โˆ’5: