Question

решите пожалуйста умоляю

Answer 1

$\frac{2a}{7} + 1 = \frac{3}{7} \\ 7( \frac{2a}{7} + 1) = 7 \times \frac{3}{7} \\ 7 \times \frac{2a}{7} + 7 = 3 \\ 2a + 7 = 3 \\ 2a = 3 - 7 \\ 2a = - 4 \\ a = - 2$

$\frac{5m}{9} + 4 = \frac{86}{9} \\ 5m + 36 = 86 \\ 5m = 86 - 36 \\ 5m = 50 \\ m = 10$

$\frac{a + 9}{9} = \frac{a + 31}{27} \\ 27(a + 9) = 9(a + 31) \\ 27a + 243 = 9a + 279 \\ 27a - 9a = 279 - 243 \\ 18a = 36 \\ a = 2$

$\frac{m - 3}{14} = \frac{m - 16}{28} \\ 28(m - 3) = 14(m - 16) \\ 28m - 84 = 14m - 224 \\ 28m - 14m = - 224 + 84 \\ 14m = - 140 \\ m = - 10$