1.Oblicz:
a) { x+y=30 b) {x+y=16 c){x-y=30 d) {x+y=20
{y=x+4 {x-y=8 {x=7y {x+y+36=180
e) {x+y=9
{10x+y+2y=62
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1.Oblicz:
a) { x+y=30
{y=x+4
x+x+4=30
2x=26
x=13
y=x+4
y=13+4
y=17
x=13
y=17
b)
{x+y=16
{x-y=8
2x=24
x=12
x+y=16
y=16-x
y=16-12
y=4
x=12
y=4
c)
{x-y=30
x=7y
7y-y=30
6y=30
y=5
x=7*y
x=7*5
x=35
x=35
y=5
d)
{x+y=20
{x+y=180-36
x=20-y
20-y+y=144
0=124
układ nie ma rozwiązania
e) {x+y=9
{10x+y+2y=62
x=9-y
10(9-y) + 3y = 62
90-10y+3y=62
-7y=-28
y=4
x=9-y
x=9-4
x=5
x=5
y=4
a) { x+y=30
{y=x+4
x+x+4=30
2x=26
x=13
y=x+4
y=13+4
y=17
x=13
y=17
b)
{x+y=16
{x-y=8
2x=24
x=12
x+y=16
y=16-x
y=16-12
y=4
x=12
y=4
c)
{x-y=30
x=7y
7y-y=30
6y=30
y=5
x=7*y
x=7*5
x=35
x=35
y=5
d)
{x+y=20
{x+y=180-36
x=20-y
20-y+y=144
0=124
sprzeczny
e) {x+y=9
{10x+y+2y=62
x=9-y
10(9-y) + 3y = 62
90-10y+3y=62
-7y=-28
y=4
x=9-y
x=9-4
x=5
x=5
y=4