Question

find the value of 7x+5y-9z for
a) x=1,y=3,z=4
b) x=2,y=5,z=3
c)x=-2,y=-4,z=1
d)x=3,y=2,z=-3
e) x=y=z=0
​

Answer 1

Answer:

a -14

b 12

c -43

d 58

e 0

Step-by-step explanation:

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Answer 2

answer is

x = -2

y = -4

x = 1

Answer is - 43