If x + y = 1, y + z = -1 and z + x = 2. W… | Answer

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Bank Exam

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Shajalal Islami Bank Ltd. - Trainee Officer (Cash) - 2016

If x + y = 1, y + z = -1 and z + x = 2. What is the value of x - y - z ?
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Solution: দেয়া আছে, x + y = 1 .............(1) y + z = -1 .............(2) z + x = 2 ...............(3) (1) নং সমীকরণ হতে (2) ও (3) নং সমীকরণ বিয়োগ করি x + y - y - z - z - x = 1 + 1 - 2 => -2x = 0 z = 0 z এর মান (2) নং সমীকরণে বসাই y + z = -1 => y + 0 = -1 y = -1 এখন y এর মান (1) নং সমীকরণে বসাই, x + y = 1 => x - 1 = 1 => x = 1 + 1 => x = 2 x = 2 অতএব, x - y - z = 2 - (-1) - 0 = 2 + 1 = 3

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If x + y = 1, y + z = -1 and z + x = 2. What is the value of x - y - z ?Reading

If x + y = 1, y + z = -1 and z + x = 2. What is the value of x - y - z ?

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If x + y = 1, y + z = -1 and z + x = 2. What is the value of x - y - z ?
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