Question

Пожалуйста, решите уравнения. Очень нужно.
1) 2/3х плюс 1/9 плюс х/27=-22
2) 2х плюс 4 = 4/3 х-3
3) 2z -1/4 = 3z +3/5

Answer 1

$\frac{2}{3} x + \frac{1}{9} + \frac{1}{27} x = - 22 \\ \\ \frac{18}{27} x + \frac{3}{27} + \frac{1}{27} x = - 22 \\ \\ \frac{19}{27} x = - 22 \frac{3}{27} \\ \\ x = - \frac{597 \times 27}{27 \times19 } \\ \\ x = - 31 \frac{8}{19}$
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$2x + 4 = \frac{4}{3} x - 3 \\ 2x - 1 \frac{1}{3} x = - 3 - 4 \\ \frac{2}{3} x = - 7 \\ x = - \frac{7 \times 3}{2} \\ x = - \frac{21}{2} \\ x = - 10.5$
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$2z - 0.25 = 3z + 0.6 \\ 2z - 3z = 0.6 + 0.25 \\ - z = 0.85 \\ z = - 0.85$