In 10 years A will be twice as old as B was 10 years ago If A is now 9

ANSWER IS 39
A+10=2(B-10)
so, A+10=2B-20
A-2B=-30 EQUATION---1
since the difference in ages between A and B is 9 years,
so A-B=9 Equation-- 2
after solving equation 1 and 2nd
B=39
10 years agoHelpfull: Yes(2) No(0)
let the age of B= x
age of A =(x+9)
so ,according to condition ,2(x-10)=(x+9+10)
so solving it x=39 so b B= 39
A=48
10 years agoHelpfull: Yes(1) No(2)
let age of B=x
(2*(x-10))-(x+10)=9
x=39
10 years agoHelpfull: Yes(0) No(0)
let present age of A & B is x and y
a/q to ques.

x+10=2(y-10) --------(1)
x = y+9 ---------(2)

solving eq 1 & 2

we get y=29.
so present age of B =29
10 years agoHelpfull: Yes(0) No(0)
sorry... it would be 39..
10 years agoHelpfull: Yes(0) No(2)
10+a=2(b-10).................(1)
a=b+9.............................(2)
on solving we get b=39
10 years agoHelpfull: Yes(0) No(0)
9
A-10=2B-10
A=B+9

=> B=9
9 years agoHelpfull: Yes(0) No(0)
a+10=2(b-10)...............(i)
a=b+9..............(ii)
=>b+9+10=2b-20
=>b=2010+9
=>b=39
9 years agoHelpfull: Yes(0) No(0)

In 10 years, A will be twice as old as B was 10 years ago. If A is now 9 years older than B the present age of B is