alleryએક બાળકની ઉંમરના બમણા વત્તા 4 બરાબર 12 થાય છે. તે બાળકની ઉંમર વર્ષમાં કેટલી છે?
A4
B6
C2
D8
Answer & Solution
Correct answer: A. 4
2x + 4 = 12 પરથી 2x = 8 મળે છે, તેથી x = 4.
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