Question

Решите уравнение:
а) 2/19+x=10/19; б) 12/17-y=7/17; в) a-4/13=7/13.

Answer 1

$1) \frac{2}{19} + x = \frac{10}{19} \\ x = \frac{10}{19} - \frac{2}{19} \\ x = \frac{10 - 2}{19} \\ x = \frac{8}{19}$

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$\frac{2}{19} + \frac{8}{19} = \frac{10}{19}$

$\frac{10}{19} = \frac{10}{19}$

$2) \frac{12}{17} - y = \frac{7}{17} \\ y = \frac{12}{17} - \frac{7}{17} \\ y = \frac{12 - 7}{17} \\ y = \frac{5}{17}$

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$\frac{12}{17} - \frac{5}{17} = \frac{7}{17} \\ \frac{7}{17} = \frac{7}{17}$

3)

$a - \frac{4}{13} = \frac{7}{13} \\ a = \frac{7}{13} + \frac{7 + 4}{13} \\ a = \frac{11}{13}$

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$\frac{11}{13} - \frac{4}{13} = \frac{7}{13}$

$\frac{7}{13} = \frac{7}{13}$