Question

Uneste prin sageti ecuatiile cu solutiile potrivite -5+x=8 2x-43=-53 -5x(-7+x)=65 S={6} S={-4} S={13} S={-5}
Dau coroana

Answer 1

Răspuns:

-5+x=8 =>x=8+5=>x=13

2x=(-53)+43 =>x=(-5)

35-5x=65 => -5x=65-35 => -5x=30 =>x=(-6)

Answer 2

Răspuns:

-5 + x = 8

x = 8 + 5

x = 13

2x - 43 = - 53

2x = 43 - 53

2x = - 10

x = - 10 : 2

x = - 5

- 5·(- 7 + x) = 65

35 - 5x = 65

35 - 65 = 5x

5x =  - 30

x = - 30 : 5

x = - 6