Answer:
x = 6
y = -5
z = 17
Explanation:
a) 6x+y-z=14
b) 2x+y+z = 22
c) 14x + 4y = 64
(a+b) (6x+y-z=14)+(2x+y+z=22) (z-z =0)
= 8x+2y=38
y = (-8x+38)/2. (Simplify)
y = -4x+19
c) 14x+4y=64
4y = -14y+64
y = (-14y+64)/4
y = -7/2x + 16
-7/2x+16 = -4x+19
-7/2x + 4x = 19-16
1/2x = 3
x = 3/(1/2)
x = 6
c) 14(6)+4y= 64
84+4y=64
y= 64-84
y = -20/4
y = -5
a) 6(6)-5-z = 14
36-5-z= 14
36-5-14=z
z= 17