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a fost răspuns

2/7este rzeolvarea ec: a)2x-7=0
b) 7x+3=5
c) 7x+2=0
d) 9x-3=2x

Răspuns :

Iakabcristina2
a)2x=7 =>x=7/2
b)7x=2 =>x=2/7
c)7x=(-2) =>x=(-2/7)
d)7x=3 =>x=3/7
răspuns b
CarMina03

2x-7=0

2x=0+7

2x=7

x=7/2



7x+3=5

7x=5-3

7x=2

x=2/7



7x+2=0

7x=0-2

7x=-2

x=-2/7



9x-3=2x

9x-2x=3

7x=3

x=3/7

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