Odpowiedź :
Poziom A.
[tex]j)\\x+7 = 9 \ \ |-7\\\\\boxed{x = 2}\\\\Spr.\\L = 2+7 = 9 = P\\\\\\k)\\7+x = 15 \ \ |-7\\\\\boxed{x = 8}\\\\Spr.\\L = 7+8 = 15 = P[/tex]
[tex]l)\\k+3 = 7 \ \ |-3\\\\\boxed{k = 4}\\\\Spr.\\L = 4+3 = 7 = P[/tex]
Poziom B.
[tex]i)\\15x = 90 \ \ /:15\\\\\boxed{x = 6}\\\\Spr.\\L =15\cdot6=90 = P \\\\\\j)\\9s = 36 \ \ /:9\\\\\boxed{s = 4}\\\\Spr.\\L = 9\cdot4 = 36 = P[/tex]
[tex]k)\\6x = 54 \ \ /:6\\\\\boxed{x = 9}\\\\Spr.\\L = 6\cdot9 = 54 = P\\\\\\l)\\3k = 27 \ \ /:3\\\\\boxed{k = 9}\\\\Spr.\\L = 3\cdot9 = 27 = P[/tex]
Poziom C.
[tex]i)\\8x + 3 = 34 \ \ |-3\\\\8x = 31 \ \ /:8\\\\\boxed{x = 3\frac{7}{8}}\\\\Spr.\\L = 8\cdot\frac{31}{8}+3 = 31+3 = 34 = P\\\\\\j)\\5s - 9 = -6 \ \ |+9\\\\5s = 3 \ \ /:5\\\\\boxed{s = \frac{3}{5}}\\\\Spr.\\L = 5\cdot\frac{3}{5}=3 = P[/tex]
[tex]k)\\7-2x= 15 \ \ |-7\\\\-2x = 8 \ \ /:(-2)\\\\\boxed{x = -4}\\\\Spr.\\7-2\cdot(-4) =7+8 = 15 = P \\\\\\l)\\6k + 3 = 33 \ \ |-3\\\\6k = 30 \ \ /:6\\\\\boxed{k = 5}\\\\Spr.\\L = 6\cdot5 = 30 = P[/tex]
Odpowiedź:
Poziom A
i) x+7=9 x=9-7 x=2; 2+7=9
k) 7+x=15 x=15-7 x=8; 7+8=15
l) k+3=7 k=7-3 k=7; 4+3=7
Poziom B
i) 15*x=90 x=90:15 x=6; 6 x 15=90
j)s*9=36 s=36:9 s=4; 4 x 9=36
k)6*x=54 x= 54 :6 x=9; 6 x 9=54
l) k*3=27 k=27:3 x=9; 9 x 3=27
i)8x=34−3
Poziom C
i) 8*x+3=34
8x=31
x=
31/8
J) 5*s-9=-6
5s=−6+9
5s=3
s= 3/5
k) 7-2*x=15
−2x=15−7
−2x=8
x=− 8/2
x=− 4
l) 6*x+3=33
6x+3=33
6x=33−3
6x=30
x=5
Szczegółowe wyjaśnienie: