Question

Solve the following system of equations by substitution and select the correct answer below: 4x − 6y = 28 8x − 4y = 24

Answer 1

According to my calculation it should be C: x=  1 and y = - 4
NOTE: I had it right on my online class.

Answer 2

Answer:

the solution is the point $(1,-4)$

Step-by-step explanation:

we have

$4x-6y=28$

isolate the variable x

$4x=28+6y$

$x=7+1.5y$ -----> equation A

$8x-4y=24$ -----> equation B

substitute the equation A in equation B

$8(7+1.5y)-4y=24$

$56+12y-4y=24$

$12y-4y=24-56$

$8y=-32$

$y=-4$

Find the value of x

$x=7+1.5(-4)=1$

the solution is the point $(1,-4)$