Question

уравнение (470-x):3+65=172

Answer 1

...=(470-х)÷3+65-172=170-х/3+65-172=149-х/3

Answer 2

( 470 - х ) : 3 + 65 = 172
( 470 - х ) : 3 = 172 - 65
( 470 - х ) : 3 = 107
( 470 - х) = 3 * 107
( 470 - х) = 321
х = 470 - 321
х = 149
ПРОВЕРКА
( 470 - 149) : 3 + 65 = 172