Question

пж помогите 3/5+x= 4/5 y-2/7=6/7

15 баллов​

Answer 1

Ответ:

1) 3/5+x=4/5 x=4/5-3/5 x=1/5 или 0,2

2) y-2/7=6/7 = 6/7 + 2/7 = 8/7

y = 8/7 = 1 целая 1/7

Answer 2

Ответ:

$\frac{3}{5} + x = \frac{4}{5} \\ \frac{3 + 5x}{5} = \frac{4}{5} \\ 3 + 5x = 4 \\ 5x = 4 - 3 \\ 5x = 1 \\ x = \frac{1}{5}$

$y - \frac{2}{7} = \frac{6}{7} \\ \frac{7y - 2}{7} = \frac{6}{7} \\ 7y - 2 = 6 \\ 7y = 6 + 2 \\ 7y = 8 \\ y = \frac{8}{7 } \\ y = 1 \frac{1}{7}$