Question

Rezolvați in mulțimea Z ecuațiile ​

Answer 1

Răspuns:

a) 7x+(13-21)=48

7x=48-(13+21)

7x=48-34

7x= 14

x=14:7

x=2

d) 3x+(25-62)=23

3x=23-(25+62)

3x=23-87

3x= -64

x= -64 :3

x=-21,(3)

acesta este d nu b pt ca le am incurcat...

b) 5x-(12-19)=-49

5x= 49+(12+19)

5x=49+31

5x= 80

x=16

c) 12x+(-53-21)=46

12x= 46-(53+21)

12x= 46-74

12x= -28

x= -28:12

x=-2(3)

e) 8x-52:(-4)=-59

8x= 59+52•4

8x= 59+208

8x= 267

x= 267:8

x=33,3

f) -48:(-6)-3x=29

3x= 29+48•6

3x= 29+288

3x= 317

x= 317:3

x= 105,(6)

Sper ca te am ajutat!

Answer 2

Răspuns:

Explicație pas cu pas:

a) 7x+(13-21) = 48  => 7x -8 = 48 => 7x = 48+8 => 7x = 56

x = 56:7 => x = 8 ∈ Z

b) 5x-(12-19) = -48  => 5x +7 = -48 => 5x = -48-7 => 5x = -55 =>

x = -55:5 => x = -11 ∈ Z

c) 12x +(-53-21) = 46 => 12x-74 = 46 => 12x = 46+74 => 12x = 120 =>

x = 120:12 => x = 10 ∈ Z

d) 3x +(25-62) = 23 => 3x-37 = 23 => 3x = 23+37 => 3x = 60 =>

x = 60:3 => x = 20 ∈ Z

e) 8x-52:(-4) = -59 => 8x +13 = -59 => 8x = -59-13 => 8x = -72 =>

x = -72:8 => x = -9 ∈ Z

f) -84:(-6) -3x = 29 => 14 -3x = 29 => 3x = 14-29 => 3x = -15 =>

x = -15:3 => x = -5 ∈ Z