Rozwiąż układ metodą podstawiania
x+y=9
2x+4y=30
x=9-y
2(9-y)+4y=30
18-2y+4y=30
-2y+4y=30-18
2y=12
y=6
x=9-6
x=3
y=-x+9
2x+4(-x+9)=30
2x-4x+36=30
2x-4x=30-36
-2x=-6/(-2)
y=-3+9
2y=30-18
2y=12 /:2
Sprawdzenie
3+6=9
2*3+4*6=6+24=30
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
x+y=9
2x+4y=30
x=9-y
2x+4y=30
2(9-y)+4y=30
18-2y+4y=30
-2y+4y=30-18
2y=12
y=6
x=9-6
x=3
x+y=9
2x+4y=30
y=-x+9
2x+4(-x+9)=30
y=-x+9
2x-4x+36=30
y=-x+9
2x-4x=30-36
y=-x+9
-2x=-6/(-2)
y=-x+9
x=3
y=-3+9
x=3
y=6
x=3
x+y=9
2x+4y=30
x=9-y
2(9-y)+4y=30
x=9-y
18-2y+4y=30
x=9-y
2y=30-18
x=9-y
2y=12 /:2
x=9-y
y=6
x=9-6
y=6
x=3
y=6
Sprawdzenie
3+6=9
2*3+4*6=6+24=30