1) (3,557+х)/2=4;
3,557+х=8;
х=8-3.557
х=4.443
2) (х-0.731)/3=5;
х-0.731=15;
х=15+0.731;
х=15.731;
3) (12.392+х)/5=2.365+2.635;
(12.392+х)/5=5;
12,392+х=25;
х=25-12.392;
х=12.608
4) (125,95-х)/(2.65+4.35)=6;
(125,95-х)/7=6;
125.95-х=42;
х=125.95-42
х=83,95