" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
x+2y+3z+4t=30
2x+y+3z+t=17
x+y+z-2t=-2
Po dodaniu I i IV rownania:
2y-t=0 ⇒ t=2y
-x+y-z+2y=2
x+2y+3z+8y=30
2x+y+3z+2y=17
-x+3y-z=2 ⇒ z=-x+3y-2
x+10y+3z=30
2x+3y+3z=17
x+10y+3(-x+3y-2)=30
2x+3y+3(-x+3y-2)=17
x-3x+10y+9y-6=30
2x-3x+3y+9y-6=17
-2x+19y=36
-x+12y=23 /*(-2)
-2x+19y=36
2x-24y=-46
---------------- +
-5y=-10
y=2
t=2*2=4
-x+12*2=23
-x=23-24
-x=-1
x=1
1+2+z-2*4=-2
z+3-8=-2
z=-2+5
z=3
Odp. x=1, y=2, z=3, t=4.