# algebra

Here is my question. How do you solve th substitution method in this problem? 9x - y = 40
y = 4x

1. 👍 0
2. 👎 0
3. 👁 293
1. Y=32
x=8

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Math

1. Explain the advantages and disadvantages of both the substitution method and the elimination method for solving a system. Help please. The only reasons I can think of is because in substitution it might be more difficult cause

asked by Amanda on February 18, 2008

What advantages does the method of substitution have over graphing for solving systems of equations? Choose the correct answer below. A. Graphing cannot be used to solve dependent or inconsistent systems due to the nature of the

asked by zwgz123 on December 15, 2017
3. ### Substitution Method-Plz help

Use the Substitution method to solve the system of equations. x + y = -4 x - y = 2 solve for x in the second equation. x= y+2 Put that in for x in the first equation: x+y=-4 (y+2) + y = -4 solve for y. Then, x= y+2 i don't get

asked by Svetlana on October 17, 2006
4. ### Pre-Calc

Solve the system of equations using either the substitution method or the multiplication/addition method answer: 3x+2y=14 2x-4y=4

asked by Anonymous on September 27, 2014
5. ### math problem

solve by substitution method 7x+8y=44 x=41-5y

asked by Lavern on January 19, 2012
1. ### algebra

x+3y=-10 7x-5y=34 solve using substitution method

asked by Anonymous on November 29, 2009
2. ### Algebra

The problem is 9x+4y=-12 x=26-5y Solve by substitution method

asked by Vic on July 3, 2011
3. ### algebra

my question is this how do you solve this equation? x=3y-1 x+2y=9 solve each system of equation by the substitution method.

asked by mayra on February 11, 2009
4. ### Math

Ok so you're supposed to solve the system by method of substitution. And the problem is: -2/3x + y = 2 2x - 3y = 6 So i put y= 2/3x into the second equation which looks like: 2x - 3(2/3x + 2) = 6 and then 2x-2x-6=6 So like

asked by Carrie on February 15, 2012
5. ### algebra

please help with the following problem using the substitution method y=2x x+y=12 thanks x + 2x = 12 3x = 12 x = 4 y = 2x = 8

asked by steve dowling on February 27, 2007
6. ### Algebra

Use the substitution method to solve -x + 3y=24 5x +8y=-5

asked by Jake on March 23, 2012