Х-290=470+230 15*х=630:7

Question

Х-290=470+230 15*х=630:7

Answer 1

Х-290=470+230
х-290=700
х=700+290
х=990
Проверка
990-290=470+230

15*х=630/7
15*х=90
х=90/15
х=6
Проверка 
15*6=630/7

Answer 2

Х-290=700
х=700-290
х=410


15*х=90
х=90:15
х=6