Question

Jack is twice as old as Jill, but in five years time he will only be one and a half times as old. How old are Jack and Jill now?

​

Answer 1

SoluTion :-

Let Jill's age be x

Then Jack's age = 2x

$2x + 5 = 1\frac{1}{2}( x + 5 )$

$2x + 5 = \frac{3x2}{y} + \frac{15}{2}$

$2x -\frac{3x}{2} = \frac{15}{2} - 5$

$\frac{x}{2}= \frac{5}{2}$

x = 5

Jill is 5 years  old

Jack is 2 x 5 = 10 years old

$\rule {200}{2} \ Be \ Brainly\ \star$

Answer 2

Step-by-step explanation:

$\bf \: Question \: \:$

Jack is twice as old as Jill but in five years time he will only be one and half times as old. How old is Jack and Jill now?

Solution:-

Find it

How old is Jack and Jill now?

$\bf \: \: given$

Jack is twice as old as Jill

$\bf \: then$

Jack = 2Jill

:

but in five years time he will only be one and half times as old.

$\bf \: according \: to \: the \: question \:$

$\bf \: Jack + 5 = 1.5(Jill+5) \\ </p><p></p><p>\bf \: Jack + 5 = 1.5Jill+ 7.5 \\ </p><p></p><p>\bf \:Jack = 1.5Jill + 7.5 - 5 \\ </p><p></p><p>\bf \:Jack = 1.5Jill + 2.5 \\ </p><p></p><p>\bf \:Replace \: Jack \: with \: 2Jill \\ </p><p></p><p>\bf \:2Jill= 1.5Jill+ 2.5 \\ </p><p></p><p>\bf \:2Jill - 1.5Jill= 2.5 \\ </p><p></p><p>\bf \:5Jill= 2.5$

$\bf \: Mult \: both \: sides \: by \: 2 \\ </p><p></p><p> \red{\bf \:Jill = 5 year} \\ </p><p>:</p><p>\bf \:let \: you \: find \: Jack's \: age \\ </p><p></p><p>\bf \:jack= 2jill \\ </p><p></p><p> \red{\bf \:jack = 2×5 = 10 \: year }\\ \:$