a farmer divides his herd of x cows among his 4 sons so that one son gets one half of the herd, the second gets one-fourth, the third gets one-fifth and the fourth gets 7 cows. then x is equal to (1) 100 (2) 140 (3)180 (4) 160 q) two trains move in the same direction at 50 kmph
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x/2 + x/4 + x/5 + 7 = x
(70x + 35x + 28x + 980)140 = x
133x + 980 = 140x
7x = 980
x = 140
(70x + 35x + 28x + 980)140 = x
133x + 980 = 140x
7x = 980
x = 140
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