Odpowiedź:
1) 3 • x = 33
3 • x = 33 /: 3
x = 11
Spr. : L = 3 • x = 3 • 11 = 33
P = 33
L = P
2) 5 • x + 22 = 62
5 • x = 62 - 22
5 • x = 40 /: 5
x = 8
Spr. : L = 5 • x + 22 = 5 • 8 + 22 = 40 + 22 = 62
P = 62
L = P
3) 8 • x - 5 - 4 • x = 15
8 • x - 4 • x = 15 + 5
4 • x = 20 /: 4
x = 5
Spr. : L = 8 • x - 5 - 4 • x = 8 • 5 - 5 - 4 • 5 =
= 40 - 5 - 20 = 35 - 20 = 15
P = 15
L = P
4) 7 • x - 9 - x = 8 - 2 • x - 1
7 • x - x + 2 • x = 8 - 1 + 9
8 • x = 16 /: 8
x = 2
Spr. : L = 7 • x - 9 - x = 7 • 2 - 9 - 2 = 14 - 9 - 2 =
= 5 - 2 = 3
P = 8 - 2 • x - 1 = 8 - 2 • 2 - 1 = 8 - 4 - 1 = 4 - 1 =
= 3
L = P
Pozdrawiam.