Question

50×(икс:16)=40150
2700+y×400=170700
(12300-30):k=30

Answer 1

50*(х:16)=40150
х:16=40150:50
х:16=803
х=803*16
х=12848
проверка
50*(12848:16)=40150
50*803=40150
40150=40150
========================
2700+у*400=170700
у*400=170700-2700
у*400=168000
у=168000:400
у=420
проверка
2700+420*400=170700
2700+168000=170700
170700=170700
==========================
(12300-30):к=30
12270:к=30
к=12270:30
к=409
проверка
(12300-30):409=30
12270:409=30
30=30