Odpowiedź:
1) 4x - 5 = 7
4x = 7 + 5
4x = 12
x = 3
2) 20x - 90 = 10
20x = 10 + 90
20x = 100
x = 5
3) 4 - 6x = 8
-6x = 8 - 4
-6x = 4
x =
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Odpowiedź:
1) 4x - 5 = 7
4x = 7 + 5
4x = 12
x = 3
2) 20x - 90 = 10
20x = 10 + 90
20x = 100
x = 5
3) 4 - 6x = 8
-6x = 8 - 4
-6x = 4
x =