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ANSWER

let us assume that c.p of the horse = x

let us assume that c.p of the horse = y

As given

A man bought 4 horses and 9 cows for rs 1340.

Than the equation

4x + 9y = 1340

As given

He sells the horses at a profit of 10% and cows at profit of 20% and his whole gain is Rs188

10 % written in the decimal form



= 0.01

20 % written in the decimal form



= 0.20

than the equation

0.01 ×4x + 0.20× 9y = 188

simplify the equation

4x + 18y = 1880

the two equation becomes

4x + 9y = 1340 and 4x + 18y = 1880

subtracting 4x + 9y = 1340 from 4x + 18y = 1880

9y = 1880 - 1340

9y = 540

y =60

put in 4x + 9y = 1340

4x + 540 = 1340

4x = 1340 - 540



x =200

He pay for each horse be Rs 200.

He pay for each cows Rs 60

total money paid for horses Rs 4x200= Rs800
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