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Solve the equations and select the correct option:3x + 5y = 132x + y = 41. x > y2. x < y3. x = y4. x ≥ Y |
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Answer» Correct Answer - Option 2 : x < y Given: 3x + 5y = 12 2x + y = 4 Calculation: 3x + 5y = 13 ….(1) 2x + y = 4 ….(2) Multipying equation (2) by 5 ⇒ 10x + 5y = 20 ….(3) Subtracting equation 2 from 3 ⇒ 10x + 5y = 20 -3x + 5y = 13 ⇒ 7x = 7 ⇒ x = 1 Replacing value of x in equation 1 ⇒ 3 + 5y = 13 ⇒ 5y = 10 ⇒ y = 2 ∴ x < y Common mistake: While multiplying and adding or subtracting terms changes the constant value should be changed |
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