On a farm 2by7 of the cows were black, while the rest 40 were white. Find the total number of cow
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Answer:
56
Step-by-step explanation:
let the total cows be x
2x/7 is the no. of black cows
so 2x/7 + 40 = total cows
2x/7 + 40 = x
40 = x - 2x/7
40 = (7x - 2x)/7
40 = 5x /7
(40 × 7)/ 5 = x
8 × 7 = x
56 = x
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