Question

(25+x)*4=360 x-(420:6)=349

Answer 1

(25+х)*4=360
25+х=360:4
25+х=90
х=90-25
х=65
Проверка
(25+65)*4=360
90*4=360
360=360


х-(420:6)=349
х-70=349
х=349+70
х=419
Проверка
419-(420:6)=349
419-70=349
349=349