Решите уравнение :(2 2/3x +1 3/7x)*21=58

( 2 2/3х + 1 3/7х ) • 21 = 58 2 2/3 + 1 3/7 = 2 14/21 + 1 9/21 = 3 23/21 = 4 2/21 ( 4 2/21 )Х • 21 = 58 ( 86/21 )Х = 58/21 86х = 58 Х = 58/86 Х = 29/43

(2 2/3*х+1 3/7*х)*21=58(2 14/21*х+1 9/21*х)*21=583 23/21*х*21=584 2/21*х*21=584 2/21*х=58:214 2/21*х=58/21х=58/21:86/21х=58/86х=29/43