Odpowiedź :
a) x : 7 = 18 / *7
x = 126
126 : 7 = 18
b) 4 * x - 12 = 36
4x = 48
x = 12
48 - 12 = 36
c) 5 * x - 1 + 6 * x = 32
11x = 33
x = 3
15 - 1 + 18 = 32
Odpowiedź:
a) x:7 = 18 |•7
x = 18 • 7
x = 126
sprawdzenie
126 : 7 = 18
b) 4 • x - 12 = 36 | +12
4 • x = 36 + 12
4x = 48 | :4
x = 12
sprawdzenie
4 • 12 - 12 = 36
48 - 12 = 36
c) 5 • x - 1 + 6 • x = 32 | +1
5x + 6x = 32 +1
11x = 33 | :11
x = 3
sprawdzenie
5 • 3 - 1 + 6 • 3 = 32
15 - 1 + 18 = 32