52
1
267
13
Correct answer is C
3e+f3f−e = 25
= 3e + f
= 2 x 1
−e+3f3e−f = 5×32
= 3e+9f=1510f=17
f = 1710
Sub. for equ. (1)
3e + 1710 = 2
3e = 2 - 1710
310
e = 310 x 13
= 110
= e + 3f = 110 + 3×10 = 5210
f - 3e = 1710 - 3 x 110
= 1410
= 5210 x 1014
= 267
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