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rezolvați ecuațiile. a) 2x-1/3=0,2. b) x+0,3=1,(6). c) 3x+1/5=1/3. d) 0,5x=3/5. e) x:1/2+1/4=3/4. f) 1/5×x+0,2=0,(6)​

Răspuns :

Norisordulce

Explicație pas cu pas:

a) 2x=0,2+1/3

2x=1/5+1/3

2x=(3+5)/15

2x=8/15

x=8/15×1/2

x=4/15

b) x+3/10=5/3

x=5/3-3/10

x=(50-9)/30

x=41/30

c) 3x=1/3-1/5

3x=(5-3)/15

3x=2/15

x=2/45

d) 1/2x=3/5

x=6/5

e) x:1/2=3/4-1/4

x:1/2=1/2

x=1

f) 1/5×x+1/5=6/9

1/5×x=2/3-1/5

1/5×x=(10-3)/15

1/5×x=7/15

x=7/3

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