(6,5-1,3х)*4/13=(0,8-3х):6/7
(26-5,2x)/13=(5,6-21x)/6
156-31,2x=72,8-273x
241,8x=-83,2
x=0,34409
(6,5-1,3x)*4//13=(0,8-3x):6//7 2-0.4x-(14//15-3.5x)=0
16//15-0.4x+3.5x=0
16//15+3.1x=0
x=(-16//15)/3.1 x=-32//93 (~-0.344)
// - черта дроби