Thursday

November 27, 2014

November 27, 2014

Posted by **harry** on Thursday, April 10, 2008 at 3:40am.

Sarah and Louise have a combined age of 24. Six years ago Sarah was triple Louise's age. What is Sarah and Louise's ages now. Let Sarah be x and Louise be y.

thankyou

Harry

- math -
**Damon**, Thursday, April 10, 2008 at 4:55amS + 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

- math - Typo fix -
**Damon**, Thursday, April 10, 2008 at 4:57amS + 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

**Answer this Question**

**Related Questions**

math - help me plz - can you solve this equation by using simultaneous equations...

Math - Sarah spends 2/5 of her monthly income on rent. Sarah's rent is $750. ...

Math - Sarah is two-thirds as old as Jenny. Jenny is 7 years older than Sarah. ...

math - David made a swing for his niece Sarah using ropes 2.4 m long, so that ...

math - mary is x years old. it is her birthday today. her sister, sherry is 4 ...

Philosophy - Provide a premise that would permit the value-expressing conclusion...

Mathematics-please help quick!! - Harry is twice as old as Doyle. Doyle's age is...

Alegabra 1 - 26 ÷ 23 Sarah is trying to solve the above expression. She takes ...

Math - Sarah's mom made cookies for Sarah and her four friends. There's one ...

Math - sarah and isabel each has an equal amount of money. After sarah spent 18 ...