Bardzo was proszę o pomoc. Zadania tylko 3,4 oraz 5 w załączniku! Z góry dzięki!
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Zadanie 3:
I kuter to 0,3x
II kuter to 2/3×0,3x
III kuter to 0,3x + 80kg
[tex]0.3x + \frac{2}{3} \times 0.3x + 0.3x + 80kg = x \\ 0.3x \times \frac{1}{5} x + 0.3x - x = - 80 \\ - 0.4x + \frac{1}{5}x = - 80 \\ - \frac{4}{10}x + \frac{2}{10}x = - 80 \\ - \frac{2}{10}x = - 80 \: \: \: \: \: \: | \times 10 \\ - 2x = - 800 \: \: \: \: \: | \div ( - 2) \\ x = 400[/tex]