Question

Решите:
а)5/27*18-5/6
б)7/8:(-3/4)-3
d)2(5-3x)=9x-2
г)8-0,6в,при в=4

Answer 1

а)5/27*18-5/6
5/27*18=5/3×2=10/3
10/3-5/6=20/6-5/6=15/6=2 3/6=
2 1/2

б)7/8:(-3/4)-3
7/8:3/4=7/8×4/3=7/6
-7/6-3=-3 7/6

d)2(5-3x)=9x-2
10-6x=9x-2
-6x-9x= -2-10
-15x= -12
X= 12/15
X=4/5

г)8-0,6в,при в=4
8-0,6×4=8-2,4=5,6