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NeTakaya
3 years ago
5

Ram is 9 years older than Hari. Three years ago, he was two times as old as Hari was. Find their present age.

Mathematics
1 answer:
True [87]3 years ago
4 0

Answer:

Ram: 21, Hari: 12

Step-by-step explanation:

To solve the problem, we can use the following notation. We call:

r = Ram's age at present

h = Hari's age at present

We know that:

- Ram is 9 years older than Hari --> mathematically, this can be written as

r=h+9

- Three years ago, Ram was two times as old as Hari was --> mathematically, this can be written as

r-3=2(h-3)

where (r-3) is Ram's age 3 years ago, while (h-3) is Hari's age 3 years ago

Substituting eq.(1) into eq.(2), we  find:

(h+9)-3=2(h-3)\\h+9-3=2h-6\\h+6=2h-6\\h=12

So, Hari's age is 12; therefore, Ram's age is

r=12+9=21

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There are special names for polynomials with 1, 2 or 3 terms:

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