Question

Розв'язування слар

 

 

 

x+2y+3z=1

x+y-2=2

x+5y+5=0

Answer 1

x+2y+3z=1

x+y-2=2

x+5y+5=0

 

x+2y+3z=1

x+y=4

x+5y= -5

 

x+2y+3z=1

x=4-y

(4-y)+5y= -5

 

z=(1-2y-x)/3 = (1+4,5-6,25)/3 = -0,75/3 = -0,25

x= 6,25

y= -2,25