Solve using any method

Question

Y=2X-6

3X+Y=4

Answer 1

 Now that is given Y explicitly in term of X , it is better off using substitution method

 

    Y = 2X -6

 

    3X + y = 4

 

    3X + 2X - 6 = 4

 

      5X = 10

     

       X = 2

 

       Y = 2( 2) - 6 = -2 

Answer 2

First, you want to plus the first equation into the second one.

 

It says that y=2x-6 so we plug (2x-6) where ever we see a y in the second equation:

 

3x + 2x -6 = 4 -> 5x-6=4

 

5x=10 -> x=2

 

Now that we have the x-value, we can plug this back into any equation.

 

3(2)+y=4 -> y=-2