SOLUTION: Ann's age is seven-tenths of Bill's age. In 4 years Ann's age will be eight-elevenths of bill's age. How old is Bill now.

Question 126289: Ann's age is seven-tenths of Bill's age. In 4 years Ann's age will be eight-elevenths of bill's age. How old is Bill now.
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Just write what it says:
:
Ann's age is seven-tenths of Bill's age.
a = .7b
:
In 4 years Ann's age will be eight-elevenths of bill's age.
(a + 4) = (b+4)
:
Multiply equation by 11:
11(a+4) = 8(b+4)
:
11a + 44 = 8b + 32
:
11a = 8b + 32 - 44
;
11a = 8b - 12
:
How old is Bill now.
:
Substitute .7b for a in the above equation
11(.7b) = 8b - 12
:
7.7b = 8b - 12
7.7b - 8b = -12
-.3b = - .12
b =
b = +40 yrs is Bill's age
:
:
To check solution find Ann's age .7(40) = 28 yrs
Check solution in the statement:
"In 4 years Ann's age will be eight-elevenths of bill's age."
(28+4) = (40+4)
32 = *44; confirms our solution
RELATED QUESTIONS
Ann's age is seven-tenths of Bills age. In 4 years Ann's age will be eight-elevenths of... (answered by josmiceli)

Anne's age is seven-tenths of Bills age. In 4 years Anne's age will be eight-elevenths of (answered by ankor@dixie-net.com)

Ann's age is seven-tenths of Bill's age. In 4 years Ann's age will be eight-elevenths of... (answered by stanbon,josmiceli)

Ann's age is seven-tenths of bills age. In 4 years Ann's age will be eight-elevenths of... (answered by Fombitz)

Ann's age is seven tenths of Bill's age. In 4 years Ann's age will be eight-elevenths of... (answered by ankor@dixie-net.com)

Ann's age is seven-tenths of Bill's age. In 4 years ann's age will be eigth-elevenths of... (answered by lwsshak3,stanbon)

Ann's age is seven-tenths of bills age. In four years Ann's age will be eight-elevenths... (answered by JBarnum)

40. Michael�s age is seven-tenths of Richard�s age. In four years Michael�s age will be... (answered by TimothyLamb,MathTherapy)

Ann's age is seven tenths of Bill's age. In 4 years Ann's age will be eight elevenths of... (answered by checkley71)