Odpowiedź:
a) 5x + 4 = 10 | - 4
5x = 10 - 4
5x = 6 | : 5
x = 6/5 = 1 i 1/5
b) 3x - 5 = 9 | + 5
3x = 9 + 5
3x = 14 | : 3
x = 14/3 = 4 i 2/3
c) -2x + 3 = 7 | - 3
-2x = 7 - 3
-2x = 4 | : (-2)
x = -2
d) -4x - 3 = 13 | + 3
-4x = 13 + 3
-4x = 16 | : (-4)
x = -4
Szczegółowe wyjaśnienie:
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Odpowiedź:
a) 5x + 4 = 10 | - 4
5x = 10 - 4
5x = 6 | : 5
x = 6/5 = 1 i 1/5
b) 3x - 5 = 9 | + 5
3x = 9 + 5
3x = 14 | : 3
x = 14/3 = 4 i 2/3
c) -2x + 3 = 7 | - 3
-2x = 7 - 3
-2x = 4 | : (-2)
x = -2
d) -4x - 3 = 13 | + 3
-4x = 13 + 3
-4x = 16 | : (-4)
x = -4
Szczegółowe wyjaśnienie: