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Rezolvatii ecuatiile in mulrimea indicata:a) 1+2\3×X=1,5+1\6×X ;b) 2÷(X-1,5)=1\4;c)0,5X+2\9=3,(5); d) 5\3×(X+2)=10,(3) e)5\4×(X-3,1)=15\8

Răspuns :

1+2/3x=1,5+1/6x 2/3x-1/6x=15/10-1/1
(2·2-1)/6x=(15-10)/10
3/6x=5/10    simplif
1/2x=1/2
2=2x
2x=2
x=2/2
x=1la pct b nu am inteles ce este dupa 2, plus sau impartirec)0,5X+2/9=3,(5)5x/10+2/9=(35-3)/9
x/2+2/9=32/9
x/2=32/9-2/9
x/2=30/9
9x=30
·2
x=60/9
x=0,(6)
d) 5/3(X+2)=10,(3)5/(3x+6)=(103-10)/9
5/(3x+6)=93/9
5/(3x+6)=31/3
3
·5=31(3x+6)
15=93x+186
93x=15-186
93x=-171
x=-171/93=-57/31
e)5/4(X-3,1)=15/8
5/(4x-12,4)=15/8
8
·5=15(4x-12,4)
40=60x-186
60x=40+186
60x=226
x=226/60=3, 7(6)