PROSZĘ O POMOC TYLKO TE OSOBY KTÓRE POTRAFIĄ ROZWIĄZAĆ TE UKŁADY RÓWNAŃ ZA DOBRĄ ODPOWIEDŹ DAM NAJ...
1)
3x=6,5-1 5/6y
2y=1⅔+ 13 x
2)
2x - 9=10-0,1y
1/5x+2,5 +1/4y=2
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z.1
3x = 6,5 - (1 5/6) y
2y = 1 2/3 + 13 x
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3x = 6 1/2 - (11/6)y
2y = 5/3 + 13 x
--------------------------
3x = 13/2 - (11/6) y / : 3
2y = 5/3 + 13 x
------------------------------
x = 13/(2*3) -[ 11/(6*3)] y
2y = 5/3 + 13 x
--------------------------------
x = 13/6 - (11/18) y
2y = 5/3 + 13*[13/6 - (11/18)y ]
2y = 5/3 + 169/6 - (143/18)y
2y + (143/18)y = 10/6 + 169/6
(36/18)y + (143/18)y = 179/6
(179/18)y = 179/6
y = (179/6) : (179/18)
y = (179/6)*(18/169)
y = 18/6 = 3
============
x = 13/6 - (11/18)*3
x = 39/18 - 33/18
x = 6/18 = 1/3
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Odp. x = 1/3 oraz y = 3
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z.2
2x - 9 = 10 - 0,1 y
(1/5)x + 2,5 + (1/4)y = 2
--------------------------------
2x =10 +9 - (1/10) y
2x = 19 - (1/10)y / : 2
x = 19/2 - (1/20)y
===============
(1/5)*[ 19/2 - (1/20)y ] + (1/4) y = 2 - 2,5
19/10 - (1/100)y + (25/100)y = - 0,5
(24/100)y = -5/10 - 19/10
(24/100) y = - - 24/10
y = (-24/10) : (24/100)
y = (-24/10) * (100/24)
y = - 100/10 = - 10
================
x = 19/2 - (1/20) *(- 10)
x = 19/2 + 10/20 = 19/2 +1/2 = 20/2 = 10
Odp. x = 10 oraz y = - 10
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