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Olegator [25]
3 years ago
7

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

Mathematics
2 answers:
Zarrin [17]3 years ago
8 0
According to my calculation it should be C: x=  1 and y = - 4
NOTE: I had it right on my online class.
Damm [24]3 years ago
4 0

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)

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