Question

Как решить уравнения
(17x-8x+3)÷7=12
2472÷(15-x÷48)=206
(346-(x÷16-398))÷7=42

Answer 1

1)(17х-8х+3)/7=12
(17х-8х+3)/7=12/1
17х-8х+3=7*12-3
9х=81
х=9
2)2472/(15-х/48)=206
15-х/48=2472/206
15-х/48=12
-х=12-15*48
-х=-144
х=144
3)(346-(x÷16-398))÷7=42
(х/16-398)/7=346-42
х/16-398=304*7
х=2128+398*16
х=40416