What is the value of x in the solution to the system of linear equations?
y=3x+2
y=x-4

a.-3
b.-2
c.1
d.3

Question

What is the value of x in the solution to the system of linear equations? 
y=3x+2
y=x-4

a.-3
b.-2
c.1
d.3

mathmale · Answer

Here you have a "system of linear equations" to solve.  Eliminate y by setting the 2 equations equal to one another.  Solve the resulting equation for x.

macaylam · Answer

-3?

mathmale · Answer

Please subst. your -3 for x into either of the given 2 equations.  Calculate y.  Then, test whether your (-3,y) makes the other equation true.

mathmale · Answer

The problem does not ask you to find y, but if you want to check your work, this would be one way to go.  -3 is correct, by the way.