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प्रश्न
Solve the following simultaneous equation.
5x + 2y = –3; x + 5y = 4
योग
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उत्तर
5x + 2y = −3 ...(1)
x + 5y = 4 ...(2)
x + 5y = 4 ⇒ x = 4 − 5y
5(4 − 5y) + 2y = −3
20 − 25y + 2y = −3
20 − 23y = −3
−23y = −3 − 20
−23y = −23
y = 1
x + 5(1) = 4
x + 5 = 4
x = −1
x = −1, y = 1
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