যদি x+y+4 = x-y-12=0 হয়, তবে 2x+y = কত?
Created: 6 years ago |
Updated: 2 years ago
best des
x + y + 4 = x - y - 12 = 0
অর্থাৎ , x + y + 4 = 0
বা, x + y = - 4 ....(i)
এবং x - y = 12 ......(ii)
(i) ও (ii) যোগ করে,
2x = 8
x = 4
(i) নং - এ x - এর মান বসিয়ে -
4 + y = - 4
বা, y = - 4 - 4
y = - 8
এখন, 2x + y = 2 x 4 + ( - 8)
= 8 - 8
= 0
Md Azizur Rahman
Founder of Satt
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