a. 2X+0,4=-0,26
2X=-0,26-0,4
2X=-0,66
2X=-66/100
Amplificam 2X cu 100
200X /100=-66/100
200X=-66
X=-66:200
X=-0,33
X=-33/100
b. 3X+1/2=-0,5
3X+0,5=-0,5
3X=-0,5-0,5
3X=-1
X=-1/3
X=0,(3)
c. (X-3):0,(6)=4/3
(X-3):6/9=4/3
X-3=4/3×6/9
X-3=24/27
Simplificam 24/27 cu 3
X-3=8/9
X=8/9+3
Amplificam pe 3 cu 9
X=8/9+27/9
X=35/9
X=3,(8)
d. 1 1/2 × X-0,5=(-3/2)^2
3/2 × X -1/2=9/4
3X /2 -1/2=9/4
3X-1 / 2=9/4
Amplificam pe 3X-1 /2 cu 2
6X-2 /4=9/4
6X-2=9
6X=9+2
6X=11
X=11/6
X=1,8(3)
