Odpowiedź:
x = 15y = 20
Szczegółowe wyjaśnienie:
x = y - 0.25y
x + 9 = 1.2y
(y - 0.25y) + 9 = 1.2y
0.75y + 9 = 1.2y
1.2y - 0.75y = 9
0.45y = 9
y = 9 / 0.45
y = 20
x = 20 - 0.25 * 20
x = 20 - 5
x = 15
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Odpowiedź:
x = 15
y = 20
Szczegółowe wyjaśnienie:
x = y - 0.25y
x + 9 = 1.2y
(y - 0.25y) + 9 = 1.2y
0.75y + 9 = 1.2y
1.2y - 0.75y = 9
0.45y = 9
y = 9 / 0.45
y = 20
x = 20 - 0.25 * 20
x = 20 - 5
x = 15