{x+2y=-8
{-5x-2y=-12
{2x+y+1=0
{3x+y-16=0
{-5x-2y=-12
{2x+y+1=0
{3x+y-16=0
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Odpowiedzi
{x+2y=-8
{-5x-2y=-12 | +
-4x=-20 / :(-4)
x=5
obl. y
x+2y=-8
5+2y=-8
2y=-8-5
2y=-13 /:2
y=-7,5
x=5
{2x+y+1=0 / *(-1)
{3x+y-16=0
-2x-y-1=0
3x+y-16=0
x-17=0
x=17
obl. y
2x+y+1=0
2*17+y+1=0
34+y+1=0
y=-35
x=17
{-5x-2y=-12 | +
-4x=-20 / :(-4)
x=5
obl. y
x+2y=-8
5+2y=-8
2y=-8-5
2y=-13 /:2
y=-7,5
x=5
{2x+y+1=0 / *(-1)
{3x+y-16=0
-2x-y-1=0
3x+y-16=0
x-17=0
x=17
obl. y
2x+y+1=0
2*17+y+1=0
34+y+1=0
y=-35
x=17
{x+2y=-8
{-5x-2y=-12
x+2y-5x-2y = -8-12
-4x = -20 /:(-4)
x = 5
5 + 2y = -8
2y = -8-5
2y = -13 /:2
y = -¹³/₂
y = -6¹/₂
{2x+y+1=0 / *(-1)
{3x+y-16=0
{-2x-y-1 = 0
{3x+y-16=0
{-2x-y=1
{3x+y = 16
-2x-y+3x+y = 16+1
x = 17
3*17+y = 16
51+y=16
y = 16-51
y = -35
Mam nadzieję, że pomogłam :)
{-5x-2y=-12
x+2y-5x-2y = -8-12
-4x = -20 /:(-4)
x = 5
5 + 2y = -8
2y = -8-5
2y = -13 /:2
y = -¹³/₂
y = -6¹/₂
{2x+y+1=0 / *(-1)
{3x+y-16=0
{-2x-y-1 = 0
{3x+y-16=0
{-2x-y=1
{3x+y = 16
-2x-y+3x+y = 16+1
x = 17
3*17+y = 16
51+y=16
y = 16-51
y = -35
Mam nadzieję, że pomogłam :)
{x+2y=-8
{-5x-2y=-12
x=-8-2y
-5x-2y=-12
x=-8-2y
-5(-8-2y)-2y=-12
x=-8-2y
40+10y-2y=-12
x=-8-2y
8y=-54/8
x=-8-2y
y=-6¾
x=-8-2*(-6¾)
y=-6¾
x=-8+13½
y=-6¾
x=5½
y=-6¾
{2x+y+1=0 / *(-1)
{3x+y-16=0
{-2x-y-1 = 0
{3x+y-16=0
{-2x-y=1
{3x+y = 16
----------------
x = 17
3*17+y = 16
51+y=16
y = 16-51
y = -35
x=17
{-5x-2y=-12
x=-8-2y
-5x-2y=-12
x=-8-2y
-5(-8-2y)-2y=-12
x=-8-2y
40+10y-2y=-12
x=-8-2y
8y=-54/8
x=-8-2y
y=-6¾
x=-8-2*(-6¾)
y=-6¾
x=-8+13½
y=-6¾
x=5½
y=-6¾
{2x+y+1=0 / *(-1)
{3x+y-16=0
{-2x-y-1 = 0
{3x+y-16=0
{-2x-y=1
{3x+y = 16
----------------
x = 17
3*17+y = 16
51+y=16
y = 16-51
y = -35
x=17
