Topic Details (Notes format)

How to Solve Linear Equations (Single Variable)

Subject: Mathematics

Book: Maths Mastery

Solving linear equations with one variable is a foundational algebraic skill. These typically appear in the form ax + b = c, where x is the variable to solve for. The key steps involve isolating x by reversing operations in a structured manner: subtract or add constants from both sides, then multiply or divide by the coefficient. For example, in 3x + 4 = 16, subtract 4 from both sides to get 3x = 12, then divide by 3 to find x = 4. Linear equations model numerous real-life situations, such as budgeting daily expenses, calculating distances, and analyzing rates. Proficiency with them paves the way for advanced mathematics like systems of equations and polynomials.

Practice Questions

If a:b = 7:9 and b:c = 5:6, what is a:c?

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If the sides of a triangle are 6 cm, 8 cm, and 10 cm, what is the area of the triangle?

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A sphere has a radius of 7 cm. What is its volume?

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If x:y = 2:3 and z:y = 4:3, what is x:z?

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If a cylinder has a radius of 7 cm and height of 10 cm, what is its volume?

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If the cost price of an item is Rs. 400 and the selling price is Rs. 500, what is the profit percentage?

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If a right triangle has legs of 9 cm and 12 cm, what is the length of the hypotenuse?

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A rectangle has a length of 10 cm and a width of 5 cm. What is the diagonal of the rectangle?

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A man spends 75% of his income and saves Rs. 600. What is his total income?

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What is the sum of the first 20 odd numbers?

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