(5/6x+1/7x)*42=82 решить уравнение
5/6*42х+1/7*42х=82
35х+6х=82
41х=82
х=82:41
х=2
5/6*x+x/7=41/42*x
41/42*42=41
х = 82/41
x=2
(5/3+2/7)*42=82