Thursday

September 18, 2014

September 18, 2014

Posted by **Daisy** on Monday, January 25, 2010 at 7:51pm.

1) y= 3x - 8

y= 4-x

2) 2x + 7y = 3

x=1- 4y

3) x = 2y

4x + 2y = 15

Any help. I know i should probably know this by now. i started mid term :/

- algebra -
**PsyDAG**, Tuesday, January 26, 2010 at 10:55am3. Substitute 2y for x in the second equation.

4(2y) + 2y = 15

Solve for y. Put that value in the first equation to solve for x. Check by putting both values in the second equation.

You can substitute either x or y value from one equation to the other to solve.

Use these steps in doing the first two problems. I hope this helps.

**Answer this Question**

**Related Questions**

PLEASE HELP!!!! I NEED IT QUICKLY!!! - Hey guys! I need some help on improving ...

Biology - I am a bit confused about conjugation, transduction and transformation...

chemistry A level - hello my teacher has really confused me. can anyone tell me ...

Algerbra 1 substitution method - im really confused about this question: 2x-3y=...

Algebra - I really appreciate your help. I am still a little confused, when I ...

Math - ok so i'm kinda sort of confused... I had this for a equation X^2 + 4X - ...

Quadratic Equations - The question is Is the point (-3, -2) a solution of the ...

Algebra II - I'm pretty confused about these problems. We're learning growth and...

algebra - Simplify 2/root 3(49) I solved it as 2 root 3(49) over 49. the system ...

chemistry - My teacher went over it really fast and now I'm just really confused...