Question

Solve the system of equations.
4x + 4y + 3z=6
4x + 7y + 5z = 5
5x + 3y + 3z= 7
a. (x = 2, y = 1,2=-2)
b. (* = 4, y=-1, z = 0)
f
c. (x = 3, y = 0, z =-3)
d. (x = 1, y = 2, 2 =-1)
Please select the best answer from the choices provided
B
оооо
D

Answer 1

Answer:

the correct answer is  a. (x = 2, y = 1, z= -2).

you can try inserting each value to all three equations and you'll see that only "a" satisfies all equations.

Step-by-step explanation:

4x+4y+3z=6

4(2)+4(1)+3(-2) = 12-6 = 6

4x + 7y + 5z = 5

4(2)+7(1)+5(-2) = 15-10 = 5

5x + 3y + 3z= 7

5(2)+3(1)+3(-2) = 13-6 = 7

now, you can clearly see that all the equations are satisified with the help of the employment of the three values x=2 , y=1, and z = -2 which makes A the correct answer.