Monday

March 30, 2015

March 30, 2015

Posted by **jim** on Thursday, March 13, 2008 at 11:09pm.

1. 6x - y = -4

2x + 2y = 15 answer:x = 1/2

y = 7

2. x +y = 1 x = -1/3

2x - y = -2 y = 4/3

3. x - y = 3 x = 5/2

6x + 4y = 13 y = - 1/2

I just need to know how to solve these problems. Please show me how it is done.

- algebra -
**drwls**, Thursday, March 13, 2008 at 11:22pmDo them all the same way: either by combining equations in a way that cancels out one unknown, or by substitution.

Here is how problem #3 can be solved:

Substitute y + 3 for x in the second equation,

6(y+3)+ 4y = 13

10y + 18 = 13

10 y = -5

y = -1/2

x = y+3 = 5/2

Now you try the others.

**Answer this Question**

**Related Questions**

algebra II - Thank you for your prompt response. I have my homework I have to ...

introductory algebra - I had these problems on my test and for some reason got ...

Pre-algebra - Could someone please help me solve the following problems, and ...

algebra - Help, Can anyone show me how to do the formula to solve these ...

Algebra - Can someone check my algebra answers and help me with the problems I ...

8th Grade Algebra- Answer Check - Solve each system of equations, give the ...

Algebra1 - P=2l+2w Solve for l. Please show me how you got your answer so I will...

algebra - can you show me how to do these problems solve the equation by finding...

algebra - solve by substitution 5x-2y = -5 y - 5x = 3 could someone take a min a...

algebra - How can I find the Domain and Range for y=1/-x -2 And y=-4/x-4 +4 they...