Lesson eLearning

Solve pair of equations: x + y = 10 and x - y = 4.

medium MCQ Class 7 · Mathematics · Simple Equations
  1. x = 7, y = 3
  2. x = 6, y = 4
  3. x = 8, y = 2
  4. x = 5, y = 5
Answer
x = 7, y = 3

The correct answer is x = 7, y = 3 — Subtracting: 2y = 6 ⇒ y = 3.

Step-by-step solution

  1. Adding equations: 2x = 14 ⇒ x = 7.
  2. Subtracting: 2y = 6 ⇒ y = 3.

Concept tested: Pair of Linear Equations

Published · How this solution was prepared and checked

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