Question

Решите: б), в), г),

Answer 1

б)
17/(0.8-x)=0.5 
 17 = 0.5(0.8 -x )  
 17 = 0.4 - 0.5x 
 17-0.4 = -0.5x 
 16.6 = -0.5x 
 x= - 33.2 
в)
12-x/1.05 =1.8
12-1.8 = x/1.05
10.2 = x/1.05
x = 10.2 *1.05 
x= 10.71
г)
128/x - 16.9 =23.1
128/x =23.1+16.9
128/x =40
x = 128/40
x =3.2