Odpowiedzi

2009-12-07T13:34:08+01:00
D)
a=b
2a+b=9

a=b
2a+a=9

a=b
3a=9

a=3
b=3
2009-12-07T13:43:53+01:00
A
{3x=12/:3
{x-y=1
x=4
4-y=1
x=4
-y=1-4
x=4
-y=-3/:(-1)
x=4
y=3
b
{5y=2/5
{x+y=2 Dwie piąte
y=2/5
x+2/5=2/5
y=2/5
x=2/5-2/5
x=0
y=2/5

d
{a=b
{2a+b=9
a=b
2b+b=9
a=b
3b=9/:3
a=b
b=3
a=3
b=3
e
{u=4v
{5u-v=10
u=4v
5*4v-v=10
u=4v
20v-v=10
u=4v
19v=10/:19
u=4v
v=10/19
u=4*10/19
u=2i2/19
v=10/19
f
{3r+s a gdzie wynik?
{3r+s=24