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प्रश्न
Solve the pair of linear (simultaneous) equation by the method of elimination by substitution:
2x + 3y = 8
2x = 2 + 3y
उत्तर
2x + 3y = 8 ...(1)
2x = 2 + 3y ...(2)
2x = 2 + 3y
Putting this value of 2x in (1)
2 + 3y + 3y = 8
∴ 6y = 8 - 2
∴ 6y = 6
∴ y = 1
From (2) 2x = 2 + 3(1)
x = `5/2`
x = 2.5
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* Question modified
Solve by the method of elimination
2x – y = 3, 3x + y = 7
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x – y = 5, 3x + 2y = 25
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