Question

решите уравнение:
1) (5,6-8х):4=1,2
2) 4/5х+6(3-2/5х)=17

Answer 1

1) 5,6-8х=1,2*4
5,6-8х=4,8
-8х=4,8-5,6
-8х=-0,8
х=-0,8:(-8)
х=0,1
2)4/5х+6(3-2/5х)=17
4/5х+18-12/5х=17
4/5х-12/5х=17-18
-8/5х=-1
х=-1:(-8/5)=-1/1*(-5/8)=5/8
х=5/8