Question

Решите уравнения: y-5/20=5/8-3/10, 2/3-(7/9-a)=1/3

Answer 1

y-5/20=5/8-3/10 2/3-(7/9-a)=1/3
y-5/20=13/40 7/9-a=2/3-1/3
у=13/40+5/20 7/9-а=1/3
у=23/40 а=7/9-1/3
а=4/9