What is the value of x in the simultaneous equations 7x - 4y = 10 and 2x + 3y = 65?
- 5
- 12
- 10
- None of these
Explanation
Given the equations:
1. 7x - 4y = 10
2. 2x + 3y = 65
Let's solve them using elimination or substitution. Multiplying equation 1 by 3 and equation 2 by 4 gives us a way to eliminate y:
1. 21x - 12y = 30
2. 8x + 12y = 260
Adding both equations:
29x = 290
x = 290 / 29
x = 10
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- None of these
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- 10x = - 3
- 2x = - 27
- 2x = 27
- None of these
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- 1, 4, -21
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اس سوال کو وضاحت کے ساتھ پڑھیں
- 2/x + 12/(x +5)
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اس سوال کو وضاحت کے ساتھ پڑھیں
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