Question

Find the solution to the system of equations.

x + y + z = 8
y + z = 5
z = 2


A. x = 3, y = 3, z = 2
B. x = 3, y = 3, z = 1
C. x = 8, y = 3, z = 2
D. x = 4, y = 3, z = 2

Answer 1

It's A

Answer 2

Use z value to find y
Use z and y value to find x
It cannot be B, because z must equal 2

Answer 3

because you sub z = 2
into y + z = 5
to get y +2 = 5
y = 5-2
y = 3
now u have both values of z and y so just sub them into the first one
x + y + z = 8
x + 3 + 2 = 8
x + 5 = 8
x = 8-5
x = 3
so therefore answer is A
x=3, y=3 and z=2

Answer 4

thanks you guys