114
212
334
5
Correct answer is C
x + 0.4y = 3...(i)
y = 12x
x = 2y
x - 2y = 0....(ii)
solve simultaneously; x + 0.4y
= 3 - x - 2y = 0
2.4 = 3
y = 3×102.4×10
= 3024=54
x - 2(54) = 0
x - 52 = 0
x = 52
x + y = 52+54
10+54=154
= 334
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