5.3x+1.8=134.3 (x-0.02)∙0.34=0.136
(х-0,02)*0,34=0,136
0,34х - 0,0068=0,136
0,34х=0,0068 + 0,136
0,34х=0,1428
х=0,42
5.3х+1.8=134.3 5.3х=134.3-1.8 5.3х=132.5 х=132.5/5.3 х=25