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а)6,5х-2,5х=19
б)4,58х+2,42х=7,14
в)7,14х+17,86х=38
г)199,29х-119,29х=72
а)6,5х-2,5х=19
б)4,58х+2,42х=7,14
в)7,14х+17,86х=38
г)199,29х-119,29х=72
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4x=19
x=19:4
x=4,75
б)4,58x+2,42x=7,14
7x=7,14
x=7,14:7
x=1,02
в)7,14x+17,86x=38
25x=38
x=38:25
x=1,52
г)199,29x-119,29x=72
80x=72
x=72:80
x=0,9