Rozwiąż układy równań.
a)
a=b
2a+b=9
b)
u=4v
5u-v=10
c)
3r=s
3r+s=24
potrzebne na jutro. Daje naj.
2a+a=9
3a=9 /:3
a=3
b=3
5*4v-v=10
19v=10 /:19
v=1,9
u=4*1,9
u=7,6
3r+3r==24
6r=24 /:6
r=4
s=3r
s=3*4
s=12
2*b+b=9
2b+b=9
3b=9
spr:
3=3
20v-v=10
19v=10
v=10/19
u=4*10/19
u=2i2/19
2i2/19=4*10/19
2i2/19=2i2/19
3r+3r=24
6r=24
3*4=s
3*4=12
12=12
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a)
a=b
2a+b=9
2a+a=9
3a=9 /:3
a=3
a=b
b=3
b)
u=4v
5u-v=10
5*4v-v=10
19v=10 /:19
v=1,9
u=4v
u=4*1,9
u=7,6
c)
3r=s
3r+s=24
3r+3r==24
6r=24 /:6
r=4
s=3r
s=3*4
s=12
a)
a=b
2a+b=9
2*b+b=9
2b+b=9
3b=9
b=3
a=3
spr:
a=b
3=3
b)
u=4v
5u-v=10
5*4v-v=10
20v-v=10
19v=10
v=10/19
u=4*10/19
u=2i2/19
spr:
u=4v
2i2/19=4*10/19
2i2/19=2i2/19
c)
3r=s
3r+s=24
3r+3r=24
6r=24
r=4
3*4=s
s=12
spr:
3r=s
3*4=12
12=12