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If 7x + 3y = 4 and 2x + y = 2, then find the value of x and y.1. x = 6, y = -22. x = -2, y = 63. x = -3, y = 44. x = 4, y = -3 |
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Answer» Correct Answer - Option 2 : x = -2, y = 6 Given: 7x + 3y = 4 and 2x + y = 2 Calculation: 7x + 3y = 4 ----(1) 2x + y = 2 ----(2) By solving, equation (1) - 3 × equation(2) ⇒ 7x + 3y - 3(2x + y) = 4 - (3 × 2) ⇒ x = -2 Putting the value of x in equation (1) 7x + 3y = 4 ⇒ 7 × (-2) + 3y = 4 ⇒ y = 6 ∴ The value of x and y is -2 and 6. |
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