Posted by harry on Thursday, April 10, 2008 at 3:40am.
S + L = 24
(S-6) = 3 (L-6)
solve first for L
L = (24 - S)
Multiply second out
S - 6 - 3 L - 18
S = 3 L -12
substitute our L from the first equation in the second equation
S = 3 (24 - S) - 12
S = 72 - 3 S -12
4 S = 60
S = 15
then use the first equation to find L
L = 24 - 15
L = 9
then check
Now
15 + 9 = 24 , yes they add to 24 check
Six years ago
15-6 = 9
9 - 6 = 3
sure enough, 9 is three times 3, check
S + L = 24
(S-6) = 3 (L-6)
solve first for L
L = (24 - S)
Multiply second out
S - 6 = 3 L - 18
S = 3 L -12
substitute our L from the first equation in the second equation
S = 3 (24 - S) - 12
S = 72 - 3 S -12
4 S = 60
S = 15
then use the first equation to find L
L = 24 - 15
L = 9
then check
Now
15 + 9 = 24 , yes they add to 24 check
Six years ago
15-6 = 9
9 - 6 = 3
sure enough, 9 is three times 3, check
Related Questions
math - help me plz - can you solve this equation by using simultaneous equations...
Linear Equations - Can you please help solve this equation using the ...
Substitution Method-Plz help - Use the Substitution method to solve the system ...
math - solve the simultaneous equations to find the coordinates of the point of ...
law - I have write a paper on a way to solve street racing and under age ...
math - how do i solve two step equations? Do you mean two equations in two ...
System of equations - 3x =2y = 17 2x-y =9 and 3x+y = 3 x+2y = -4 How do I do ...
Math age problem - louise is 4 years younger than jennifer now. In 10 years, ...
math - 1. Samuel is 2/3 as old as his brother. In five years, he will be 3/4 as ...
Math - Write two equations that have your two integers as solutions. Show how ...
For Further Reading
