Question

A is two years older than b who is twice as old as c. If the total of the ages of a, b and c be 27, then how old is b?.

Answer 1

10

Explanation:

A is 2 years older than B who is twice older than C

so, the equation should be:

• 
  `( x+ 2) +x +(1)/(2)x= 27`

A=
`x + 2`

B=
`x`

C =
`(1)/(2) x`

B is the main variable because in the original question it states

A is two years older than b who is twice as old as c. If the total of the ages of a, b and c be 27, then how old is b?

• 
  `x+2-2+x+(1)/(2)x=27-2`

• 
  `x+x+(1)/(2)x=25`

• 
  `2(1)/(2) x= 25`
• 
  `(2(1)/(2)x =25 )/(2(1)/(2) )`
• 
  `x=10`

now input 10 in x

• 
  `( 10+ 2) +10 +(1)/(2)10= 27`

10·
`(1)/(2) = 5`

• 
  `12+10 +5= 27`

Hope This Helped