Plis prosze o rozwiązanie.
2x + 2z = 48 / x (-1)
2x + z = 39
-2x - 2z = -48
-z = - 9 / : (-1)
z = 9
2x + 2z = 48
2x + z = 39 / x (-2)
-4x - 2z = - 78
-2x = - 30 / : (-2)
x = 15
metoda przeciwnych współczynników
2x+2z=48
2x+z=39
z=39-2x
2x+2(39-2x)=48
2x+78-4x=48
-2x=-30 /:(-2)
x=15
z=39-2*15
z=39-30
z=9
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
2x + 2z = 48 / x (-1)
2x + z = 39
-2x - 2z = -48
2x + z = 39
-z = - 9 / : (-1)
z = 9
2x + 2z = 48
2x + z = 39 / x (-2)
2x + 2z = 48
-4x - 2z = - 78
-2x = - 30 / : (-2)
x = 15
z = 9
x = 15
metoda przeciwnych współczynników
2x+2z=48
2x+z=39
2x+2z=48
z=39-2x
2x+2(39-2x)=48
z=39-2x
2x+78-4x=48
z=39-2x
-2x=-30 /:(-2)
z=39-2x
x=15
z=39-2*15
x=15
z=39-30
x=15
z=9