2x+9,8-13,6
10,36-3x=5,86
4,2x-6=3,66
19,5-0,3x=15.,9
(7-0,2x)*1,4=7,57
(6,1x-13,2)/1,7=

2x+9,8=13,62x=13,6-9,82x=3,8x=3,8/2x=1,910,36-3x=5,86-3x=5,86-10,36-3x=-4,5x=1,54,2x-6=3,664,2x=6+3,664,2x=9,66x=9,66/4,2x=2,319,5-0,3x=15,9-0,3x=15,9-19,50,3x=3,6x=3,6/0,3x=12(7-0,2x)*1,4=7,577-0,2x=7,57/1,4-0,2x=7,57/1,4-7-0,2x=(75,7-98)/14x=22,3/14*0,2x=223/28x=7 27/28