Friday

April 18, 2014

April 18, 2014

Posted by **Sara** on Saturday, December 8, 2012 at 8:32am.

- Algebra -
**Reiny**, Saturday, December 8, 2012 at 10:37amI think you have a typo and you should have 12t in the first equation

If so, then drwls made the following observation

http://www.jiskha.com/display.cgi?id=1282324238

- Algebra -
**khan**, Saturday, December 8, 2012 at 11:43pm8s+12=16............. equation 1

6s+9t=12............. equation 2

Multiply equation 1 by 3 and equation 2 by 4 and subtract.

+24s+36= +48

+24s+36t=+48

- - - (sign will change when sub)

.............

36-36t=0

t=1

put t=1 in equation 2

6s+9(1)=12

s=1/2

CHECK 6(1/2)+9(1)=12

12=12

LHS=RHS so your answer is correct

**Related Questions**

Algebra - 8s+12t=16, 6s+9t=12 solve using the substitution method

algebra - Again I have no clue in figuring out this problem, please help: (3s^4-...

algebra - Again I have no clue in figuring out this problem, please help: (3s^4-...

Math - help me solve this conic: 12x^2+y^2+6x-9=0 not sure what you mean by "...

Algebra, math - how do I find a value of x that will make each proportion true...

Algebra - Hello all - I would like to check my work on 2 problems. Solve by ...

Math - How do you do this problem because i feel like i did it wrong (32 + 4)^...

Factoring - Factor Completely: 3t^3 + 5t^2 - 12t first take out the t so you ...

algebra - Rearrange (r+s)/8s=(r-s)/8n to make r the subject. OK, I have started ...

math - solve and express the answer as an improper fraction in lowest terms 5/6-...