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If 5x - 3y = 13438 and 5x-1 + 3y+1 = 9686, then x + y equals |
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Answer» Calculation: 5x – 3y = 13438 ----(i) 5(x – 1) + 3(y + 1) = 968 (5x/5) + 3 × 3y = 9686 ----(ii) Multiplying equation 1 by 3 and adding, we get ⇒ 5x = 15625 ⇒ 5x = 56 So, x = 6 Putting x in equation 1, we get ⇒ 3y = 2187 ⇒ 3y = 37 So, y = 7 So, x + y = 7 + 6 = 13 ∴ The value of x + y is 13. |
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