Question

rezolvati urmatoarele ecuatii in multimea indicata :

a. 7x=14, x apartine N
b. 3x=5+(-1 la puterea 2), x ap Z
c. 2x+4x=15,x ap Q
d. 6x-3x=12, x ap Q
e. 2x+5=2 la puterea 2, x ap N
f. 6x+3x=-18, x ap N
g. x*(10+3)-5=21, x ap N
h. 4x+3=-1, x ap Q
i. x-3x=10, x ap Z

'' *" inseamna ori​

Answer 1

Răspuns:

a) 7x=14=>x=14/7=2

b) 3x=5+(-1)^2

3x=6=>x=2

c)2x+4x=15

6x=15=>x=15/6=5/2

d)6x-3x=12

3x=12=>x=12/3=4

e)2x+5=2^2

2x=-5+4

2x=-1

x=-1/2

f)6x+3x=-18

9x=-18=>x=-18/9=-2

g)x*(10+3)-5=21

10x+3x=26

13x=26=>x=2

h) 4x+3=-1

4x=-4=>x=-1

i)x-3x=10

-2x=10=>x=-5

Explicație pas cu pas:

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