Tuesday

March 3, 2015

March 3, 2015

Posted by **B.B.** on Saturday, April 17, 2010 at 12:19pm.

Solve by the elimination method.

7r-9s= -58

9r+7s=74

I know that I need to multiply the first equation by 9 and the second equation by 7.

The equations look like this:

63r-81s= -522

63r+49s=518

After this I get confused. Could someone please help?

Thanks.

- Math -
**bobpursley**, Saturday, April 17, 2010 at 12:24pmsubtract

0r-130s=-1040

- Math -
**B.B.**, Saturday, April 17, 2010 at 12:35pmBut how would I solve for r?

s=8 does that mean r=0?

Thanks.

- Math -
**B.B.**, Saturday, April 17, 2010 at 12:37pmNever mind I got the answer for r.

Thanks.

**Answer this Question**

**Related Questions**

algebra2 - solve the systems of equation: First : 4x-2y = 2 Second: y = -4x-7 ...

math - Solve by elimination method. 2r-5s=-33 5r+2s=48 I keep getting different...

need guidance on an algebra problem - 20 x+3(y-1)=11 2(x-y)+8y = 28 multiply ...

Algebra - How do I solve for elimination method on this problem: 0.3x - 0.2y=4 ...

math,algebra II - I need someone to explain to me step by step the process of ...

math - Please solve the system with the elimination method. Explain each step as...

algebra II - Select the best possible first step to solving the system by first ...

Substitution Method-Plz help - Use the Substitution method to solve the system ...

Algebra - Please help to find x, y 1. 8x-y=17 6x+y=11 2. 5x-2y=17 2x+3y=3 ...

math - Review example 2 How does the author determine what the? Example 2. ...