Question

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Answer 1

Answer:

50/100*(x-y) =30/100*(x+y)

(x-y)/2 = 3(x+y)/10

(x-y) = 3x + 3y /5

5x-5y = 3x+3y

5x-3x = 3y + 5y

2x = 8y

x= ky

2ky = 8y

2k = 8

k = 4

Answer 2

Step-by-step explanation:

Step 1 Solve both th sides and writ them as 50/100 × (x - y) = 30/100 ×(x + y)

= 1/2(x - y) = 3/10(x + y)

Step 2

Cross multiply them

you'll get 10x-10y = 6x + 6y

Step 3 now solve the eq by transposition

You'll get 4x=16y

Now x=4y (divide both sides by 4)

So value of k is 4

as x= ky