Odpowiedź:
a)
3 - x = 2x + 1
-x - 2x = 1 - 3
-3x = -2 /: (-3)
x = 2/3
Sprawdzenie:
3 - 2/3 = 2 • 2/3 + 1
2 i 3/3 - 2/3 = 4/3 + 3/3
2 i 1/3 = 7/3
2 i 1/3 = 2 i 1/3
L = P
b)
5x - 5 = 16 - 2x
5x + 2x = 16 + 5
7x = 21 /: 7
x = 3
5 • 3 - 5 = 16 - 2 • 3
15 - 5 = 16 - 6
10 = 10
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Odpowiedź:
a)
3 - x = 2x + 1
-x - 2x = 1 - 3
-3x = -2 /: (-3)
x = 2/3
Sprawdzenie:
3 - 2/3 = 2 • 2/3 + 1
2 i 3/3 - 2/3 = 4/3 + 3/3
2 i 1/3 = 7/3
2 i 1/3 = 2 i 1/3
L = P
b)
5x - 5 = 16 - 2x
5x + 2x = 16 + 5
7x = 21 /: 7
x = 3
Sprawdzenie:
5 • 3 - 5 = 16 - 2 • 3
15 - 5 = 16 - 6
10 = 10
L = P