Subject
Govt.Jobs
Topic
সাব-রেজিস্ট্রার-২০১২
3x + 2y = 7 এবং 2x = y হলে (x,y) হবে—
3x + 2y = 7 এবং 2x = y হলে (x,y) হবে—
ক)
(2,1)খ)
(3,1)গ)
(1,2)ঘ)
(-1, -2)Explanation
2x=y or, x=y/2--------(i) So, 3(y/2) + 2y = 7 or, 3y/2 + 2y=7 or, (3y+4y)/2 =7 or, 7y/2=7 or, y=14/7 or, y=2 y এর মান (i) নং সমীকরণে বসাই, x=2/2 or, x=1 সুতরাং, (x,y)=(1,2) Ans.Related questions
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