6.4-9х-6=0
9х=0.4
Х=0.4/9=0.0(4)
3.4-72х-14=0
72х=-10.6
Х=-10.6/72=0.147
3.6-6.6+4=3+4=7
3.7-3*2*а+9/2-7а-5.2=0
13а=3
А=3/13=0.231
6.4-9х-6=0
9х=0.4
Х=0.4/9=0.0(4)
3.4-72х-14=0
72х=-10.6
Х=-10.6/72=0.147
3.6-6.6+4=3+4=7
3.7-3*2*а+9/2-7а-5.2=0
13а=3
А=3/13=0.231