Question

Решите уравнения:
а)6.4x-2.5x=19
б)4.58х+2.42х=7.14
в) 7.14х+17.86х=38х
г)199.29х-119.29x=72

Answer 1

a)3.9x=19
x=19/3.9=19/(39/10)=190/39
x=190/39

б)4.58x+2.42x=7.14
7x=7,14
x=7,14/7

в)7,14x+17,86x=38
25x=38
x=38/25=1,52
x=1,52

г)199,29x-119,29x=72
80x=72
x=72/80