Homework Help: Elimination Method Help

Posted by upbeat on Tuesday, July 20, 2010 at 11:39am.

solve by the elimination method

5x+5y= -7
7x-3y=19

The solution is (___,___)

Please help I am lost on how to work and complete this one.

Elimination Method Help - drwls, Tuesday, July 20, 2010 at 11:58am
Manipulate the equations so you can eliminate one variable.
One way would be to multiply the first equation by 3, and the second equation by 5. Always do this for BOTH SIDES of the equations.

15x + 15y = -21
35x - 15y = 95
Now add them and the y term is eliminated.

50x = 74
x = 37/25

Use any of the equations with x and y to solve for y. It looks like a rather messy fractional answer.

Check my work; I'm sloppy
Elimination Method Help - upbeat, Tuesday, July 20, 2010 at 12:54pm
I see where and how you can up with 50x=74 but where did the x=37/25 come from that confuses me.

Thank you for your help
Elimination Method Help - Ms. Sue, Tuesday, July 20, 2010 at 1:00pm
50x = 74

Divide both sides of the equation by 50.

x = 74/50 = 37/25
Elimination Method Help - carlo, Thursday, February 9, 2012 at 6:29am
3454657654

Answer this Question

Related Questions

Math Elimination method - Use the elimination method to solve x+8y= 47 -x + 4y= ...
algebra - solve the system by the elimination method 5x+5y=-7 7x-3y=19
algebra - solve by elimination method what is the solution of the system? 0.3x-0...
Math Algebra - Please help Solve by the elimination method x+7y=54 -x + 6y=37 ...
math - Elimination Method....I am not understanding this method either and need ...
algebra - solve by the elimination method What is the solution of the system? 5x...
math elimination method - elimination method really confuses me. solve by ...
Pre-Calculus - Solve for x,y,z, & w using the Gauss-Jordan Elimination ...
colege algebra - Solve the system by the elimination method 5x+5y=-7 7x-2y=13 ...
math help please - solve the system by the elimination method: 5x+3y=-13 & ...

For Further Reading

First Name:
School Subject:
Answer: