Решить уравнение: 53.8x-17.9x+28.1x+39.457=172.001
53.8x-17.9x+28.1x+39.457=172.001 64 х=172,001-39,457 64 х=132,544 х=132,544 : 64 х=2,071 проверим 53,8*2,071-17,9*2,071+28,1*2,071+39,457=172,001 111,4198-37,0709+58,1951+39,457=172,001 172,001=172,001