Odpowiedź:
11) 8y = 48
8y = 48 /: 8
y = 6
Spr. : L = 8y = 8 • 6 = 48
P = 48
L = P
12) 3c = 27
3c = 27 /: 3
c = 9
Spr. : L = 3c = 3 • 9 = 27
P = 27
L = P
13) 10k = 180
10k = 180 /: 10
k = 18
Spr. : L = 10k = 10 • 18 = 180
P = 180
L = P
14) 12y = 60
12y = 60 /: 12
y = 5
Spr. : L = 12y = 12 • 5 = 60
P = 60
L = P
15) 5a = 35
5a = 35 /: 5
a = 7
Spr. : L = 5a = 5 • 7 = 35
P = 35
L = P
16) 7x = 40
7x = 40 /: 7
x = 5 5/7
Spr. : L = 7x = 7 • 5 i 5/7 = 7 • 40/7 = 1 • • 40/1 = 40
P = 40
L = P
17) 9y = 23
9y = 23 /: 9
y = 2 5/9
Spr. : L = 9y = 9 • 2 i 5/9 = 9 • 23/9 = 1 • • 23/1 = 23
P = 23
L = P
18) 8r = 33
8r = 33 /: 8
r = 4 1/8
Spr. : L = 8r = 8 • 4 i 1/8 = 8 • 33/8 = 33
P = 33
L = P
19) -4x = 16
-4x = 16 /: (-4)
x = -4
Spr. : L = -4x = -4 • (-4) = 16
P = 16
L = P
20) -5x = 35
-5x = 35 /: (-5)
x = -7
Spr. : L = -5x = -5 • (-7) = 35
P = 35
L = P
21) -6x = -44
-6x = -44 /: (-6)
x = 7 1/3
Spr. : L = -6x = -6 • 7 i 1/3 = -6 • 22/3 = -2 •
• 22/1 = -44
P = -44
L = P
Szczegółowe wyjaśnienie:
Pozdrawiam.
