Rozwiąż równanie:
a)
z proporcji (mnozac na "krzyz')
5 * x = 4 * 9
5x = 36 / : 5
x = 7,2
lub
4/x = 5/9 | *9
4/x * 9 = 5 | * x
4 * 9 = 5 * x
5x = 36 | :5
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z proporcji (mnozac na "krzyz')
5 * x = 4 * 9
5x = 36 / : 5
x = 7,2
lub
4/x = 5/9 | *9
4/x * 9 = 5 | * x
4 * 9 = 5 * x
5x = 36 | :5
x = 7,2