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a fost răspuns

Rezolvatii ecuatiile 3×x-2,7=1,11
0,25x+1= 3 supra 2
1 supra 9 ×x-3=5,25
0,(2)x+3,5=3,75
2 supra 3x-2=0,(3)


Răspuns :

3×x-2,7=1,11
3x=3,81
x=1,27=127/100

0,25x+1= 3/2
0,25x=1/2
0,25x=0,5
x=2

1/9 ×x-3=5,25
(1/9)x=8,25
x=74,25=297/4

0,(2)x+3,5=3,75
(2/9)x=0,25
2x=2,25
x=1,125=9/8

(2/3)x -2=0,(3)
(2/3)x -2=3/9
(2/3)x -2=1/3
(2/3)x=7/3
2x=7
x=7/2=3,5