The ratio between the ages of Amar and Kabir is 3:4 at present. after 4 years ago their ages would be 7:9.ratio of ages of Kabir and amar after 20 years from now?

Step-by-step explanation:

Represent Amar age with x

Represent Kabir age with y

So, we have:

Presently

After 4 years

Simplify both ratios:

Cross Multiply

Make x the subject

Cross Multiply

Open Brackets

Collect Like Terms

Substitute for x in

Substitute 32 for y in

So, in 20 years time, the ratio of the ages would be:

This gives

Divide by 4

Hence, the Ratio is

i think 5 miles per hour

step-by-step explanation:

5=812a+9+3

step 1: simplify both sides of the equation.

5=812a+9+3

5=(812a)+(9+3)(combine like terms)

5=812a+12

5=812a+12

step 2: flip the equation.

812a+12=5

step 3: subtract 12 from both sides.

812a+12−12=5−12

812a=−7

step 4: divide both sides by 812.

812a /812 = -7/812

a= -1/116

so the answer is

a=   -1/116