Question

Rezolvați în Q, ecuatiile:
a) 0,24x-3,6=0
b) 5/2x+1=0
c)1/2-3/4x =0
d) 0,3x-1=0,2
e) -3/2x +0,2=1/6
f ) 0,5-2/3x=1/6

Answer 1

a) 0,24x-3,6=0
x=3,6/0,24=15

b) 5/2x+1=0
x=-1/(5/2)=-2/5

c)1/2-3/4x =0
x=1/2/(3/4)=1/2*4/3=2/3

d) 0,3x-1=0,2
x=1,2/0,3=4

e) -3/2x +0,2=1/6
-3/2x=1/6-0,2=1/6-1/5=(5-6)30=-1/30
3/2x=1/30
x=1/30 *2/3=2/90=1/45

f ) 0,5-2/3x=1/6
2/3 x =0,5-1/6=(3-1)/6=2/6=1/3
2x=1
x=1/2