(9w-12u+3-27w+18):3 w=1/3 u=(-2) 94k-5z+2k-7z-8):(-1/3) k=(-1) z =(-3) (20a-16c+4-12a+3c-4):2 a=10 c=(-10) 3(5k-8z+2n-9z+2k-5) k=6 z=5 n=(-1) 1/4(20m-40+4m-16+24n) m=1/4 n= (-1/2) -5(6x-5y+2-12x+6y) x=1/3 y=(-4)
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* - znak mnożenia
(9w -12u +3 - 27w +18) : 3
3w - 4u +3 - 9w +6
skracamy do jak najprostrzej postaci
-6w -4u +9
teraz postawiamy pod w=1/3 u=-2
-6 * 1/3 - 4* (-2) +9 =
-3 +2 +9 = 8
(94k - 5z +2k - 7z - 8) : -1/3
-282k + 15z - 6k - 21z +24
podstawiamy liczny
(-282 * (-1)) + 15 * (-3) - 6*(-1)- 21 *(-3) +24 =
282 - 45 +6 +63 +24 = 330
(20a - 16c +4 -12a +3c -4) : 2
10a - 8c + 2 -6a +1,5c -2
podstawiamy
10* 10 - 8* (-10) +2 - 6 *10 +1,5 * (-10) - 2 =
100 + 80 + 2 -60 -15 -2 = 105
3(5k - 8z +2n - 9z +2k - 5)
15k - 24z +6n - 27z +6k -15
skracamy
21k - 51z +6n -15
podstawiamy
21 * 6 - 51 * 5+ 6 * (-1) -15=
126 -255 -6 -15 = 150
1/4 (20m - 40 + 4m - 16 + 24n)
5m - 10 + m - 4 +6n
skracamy
6m - 10 + 6n
podstawiamy
6* 1/4 -10 + 6 *(-1/2) =
6/4 - 10 - 3 = -11 3/4
-5(6x - 5y +2 -12x +6y)
-30x +25y -10 +60x -30y
skracamy
30x - 5y -10
podstawiamy
30 * 1/3 - 5 * (-4) - 10 =
10+20-10=20