If 3(x-y) = 27 and 3(x+y) = 243, then x is equal to:
Solution
Correct Answer: Option B
Solution:
3(x-y) = 27
=> 3(x-y) = 33
=> x - y = 3 .............(1)
আবার, 3(x+y) = 243
=> 3(x+y) = 35
=> x + y = 5 ................(2)
এবার (1) ও (2) নং সমীকরণ যোগ করে পাই
x - y = 3
x + y = 5
_________________
2x = 8
=> x = 4
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