Proszę o pomoc!
Rozwiąż to równanie:
x
x / 12 = (x + 10) / 20
20 * x = 12 * (x + 10)
20x = 12x + 120
20x - 12x = 120
8x = 120
x = 15
x x+10
--- = ---------- korzystając z proporcji mamy:
12 20
20x = 12(x+10)
20x = 12x+120
20x-12x = 120
8x = 120 /:8
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x / 12 = (x + 10) / 20
20 * x = 12 * (x + 10)
20x = 12x + 120
20x - 12x = 120
8x = 120
x = 15
x x+10
--- = ---------- korzystając z proporcji mamy:
12 20
20x = 12(x+10)
20x = 12x+120
20x-12x = 120
8x = 120 /:8
x = 15
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