Question

Find the solution to the system of equations.

x+y+z=11
y+z=12
z=8

Answer 1

y + 8 = 12 --> y = 4
x + 4 + 8 = 11 --> x = -1

Answer 2

y+z=12
y+8=12
y=4

x+y+z=11
x+4+8=11
x+12=11
x=-1