Question

Find the solution to the system of equations.

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

Answer 1

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

Answer 2

You are given the z, so substitute that into the other two equations.

Answer 3

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

Answer 4

It would be the A

Answer 5

Now, the solution for y comes in handy from the 2nd equation,
and then substitute the solution for y into the 1st equation and
solve for x.

Answer 6

It is impossible to be A, because you already know that z=2 (not 1).

Answer 7

so it would be B @SolomonZelman ?

Answer 8

Yes, B is correct !

Answer 9

Ops wasn't paying attention I meant to say B thanks for the catch :)

Answer 10

Thanks !