Question

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Answer 1

Explicación paso a paso:

buscaremos los denominadores

$\frac{5x + 3y}{15} = \frac{2}{7} \\ 7(5x + 3y) = 15(2) \\ 35x + 21y = 30 \\ x = \frac{30 - 21y}{35}$

$\frac{5x + y}{10} = \frac{3}{7} \\ 7(5x + y) = 3(10) \\ 35x + 7y = 30 \\ x = \frac{30 - 7y}{35}$

$\frac{30 - 21y}{35} = \frac{30 - 7y}{35} \\ 30 - 21y = 30 - 7y \\ - 14y = 0$

$\frac{x}{3} + \frac{0}{5} = \frac{2}{7} \\ \frac{x}{3} = \frac{2}{7} \\ x = \frac{6}{7}$

y = 0

x = 6/7