Odpowiedź:
-12 x – 6 = -30 | +6
-12x = -24 | :(-12)
x = 2
24x + 12 = -60 | -12
24x = -72 |:24
x = 3
25 - 2x = 5 | -25
-2x = -20 | :(-2)
x = 10
-28 +7x = 21 | +28
7x = 49 | :7
x = 7
1/3x - 5 = 21 | +5
1/3x = 26 | •3
x = 78
1/7x - 5/7 = 8/7 | +5/7
1/7x = 13/7 | •7
x = 13
Szczegółowe :
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