Question

1 2/7- (5-y)=9 1/7
Решите уравнение.

Answer 1

5-y=$1 frac{2}{7}-9 frac{1}{7}$
5-y=$-7 frac{6}{7}$
y=5+7$frac{6}{7}$
y=$12 frac{6}{7}$