Question

Solve the system of equation?2x - 4y = 107x - y = 12​

Answer 1

Answer:

x = 1.153846153846154

y = -1.923076923076923

Step-by-step explanation:

Multiply 7x - y = 12 by -4 and then add it to 2x - 4y = 10

       2x - 4y = 10

+(-4( 7x - y = 12))

     -26x = -30

     $\frac{-26x}{-26} = \frac{-30}{-26}$

    x = 1.153846153846154

Then plug in x to get y.

  2(1.153846153846154) - 4y = 10

      2.307692307692308 - 4y = 10

     -2.307692307692308          -2.307692307692308

                 -4y = 7.692307692307692

                 $\frac{-4y}{-4} = \frac{7.692307692307692}{-4}$

                 y = -1.923076923076923