Question 808149: Jack is 27 years older than susan. in 5 years time he will be 4 times as old as her. find the present ages of jack and susan Found 2 solutions by TimothyLamb, josmiceli:Answer by TimothyLamb(4379) (Show Source):
You can put this solution on YOUR website! j = s + 27
---
j + 5 = 4(s + 5)
j = 4s + 20 - 5
j = 4s + 15
---
j = s + 27
j = 4s + 15
---
4s + 15 = s + 27
3s = 12
s = 4
---
Answer:
Susan is 4
Jack is 31
---
Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
---
Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
---
Convert fractions, decimals, and percents:
https://sooeet.com/math/fraction-decimal-percent.php
---
Calculate and graph the linear regression of any data set:
https://sooeet.com/math/linear-regression.php
You can put this solution on YOUR website! Let = Jack's age now
Let = Susan's age now = Jack's age 5 yrs from now = Susan's age 5 yrs from now
-----------------------------------
(1)
(2)
-----------------------
(2)
(2)
and
(1)
-------------------
Subtract (2) from (1)
(1)
(2)
and
(1)
(1)
(1)
Jack is 31 and Susan is 4
check:
(2)
(2)
(2)
(2)
OK
