Sunday

December 21, 2014

December 21, 2014

Posted by **ggift** on Monday, November 23, 2009 at 9:28pm.

Solve by elimination method:

3r - 5s = 6

5r + 3s = 44

I thought that I could do vertical addition,when I do, I get 8r - 2s = 50...........but none of the variables are eliminated.

- Algebra -
**Anonymous**, Monday, November 23, 2009 at 10:23pmelimination method means to eliminate one of the variables.let us eliminate s.

3r - 5s = 6 ---I

5r + 3s = 44 --II

as a thumb rule multily eq I by 3 (coef. of s in eq II) and multiply eq II by 5 (coef. of s in eq II)

9r - 15s = 18 ---I

25r +15s = 220 --II

By vertical addition

34r=238

r=238/34=7

s=(3r-6)/5=(21-6)/5 =3

verification: sub stitute r and s in eq.1 we have

(3*7)-(5*3)=6 tallied hnece correct

**Answer this Question**

**Related Questions**

Algebra - Solving system of linear equations by using the apropiate method name ...

Algebra - Solve by elimination method. 7r-3s=14 3r+7s=64 Could never figure out ...

Algebra/Elimination method - Solve using the elimination method. If the system ...

math elimination method - elimination method really confuses me. solve by ...

Algebra II - How do you solve the linear equations x+y=5 3x-y=3 by use of the ...

algebra - Solve by elimination method. 2r-5s=-33 5r+2s=48 Solve by substitution ...

algebra - 7r-3s=18 3r+7s=16 Solve by the elimination method, please.

algebra - solve by the elimination method 3x+4y=3 6x+8y=6 help please

Elimination Method Help - solve by the elimination method 5x+5y= -7 7x-3y=19 The...

Algebra 1 a - Need help to solve can anyone help me please 6x-9y = 25.5 7y-2x =-...