Question

Решите уравнение 21у+13у-17у=187

Answer 1

21y + 13y - 17y = 187;
34y - 17y = 187;
17y = 187;
y = 187 : 17;
y = 11.

Answer 2

21у+13у-17у=187 
17у=187 
у=187:17
у=11