Monday

September 22, 2014

September 22, 2014

Posted by **Riley** on Wednesday, November 12, 2008 at 12:02pm.

3x + y = 12

y = 9 - 3x

I used the substitution method to get

3x + 9 - 3x = 12

But now I'm stuck.

- Math -
**bobpursley**, Wednesday, November 12, 2008 at 12:49pmThe system is indeterminate. THe two lines are parallel, and do not have a solution. Rearrange the second equation to

3x+y=9 Which is the same x,y coefficents as the first equation.

- Math -
**Reiny**, Wednesday, November 12, 2008 at 12:50pmSolving a system of equations means finding the intersection of the two lines.

Your 2 equations represent two parallel lines, they cannot intersect, therefore you cannot have a solution.

**Answer this Question**

**Related Questions**

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

Linear Equations - Can you please help solve this equation using the ...

substitution method - Solve by substitution method please help me solve this. I ...

Substitution Method - Use the Substitution method to solve the system of ...

Math - How would you solve each system by the substitution method? 1. Y=6x-5 Y=-...

Math - Solve the system by using the substitution method. y= 3/4x - 4 -x + 2y= -...

math - Solve by the substitution method. What is the solution of the system? 3x+...

math - solve the system 3x-6y=5 and 2y=4x-6 using substitution method.

Math 208 - Solve each system by the substitution method. x+3y=2 -x+y=1

0303 math - Solve the system by the substitution method y=-2x-4 5x-2y=-1