Question

решить уравне 81y-38y=645

Answer 1

81y-38y=645 43y=645. |:43 Y=15

Answer 2

обесните

Answer 3

81y-38y=645
43y=645
y=645/43
y=15

Answer 4

Проверка:81*15-38*15=645
1215-570=645
645=645