Question

va rooog. Dau coroana

Answer 1

Salut,

a)

5(x+2)-4x+3=-3(x+1)

5x+10-4x+3=-3x-3

x+13=-3x-3

x+3x=-3-13

4x=-16

x=-16/4

x=-4.

b)

4-(-3)[(-11)*x+(-13)*(+7):(-18)=10

4+3(-11x+91)/18=10

4-3(-11x-91)/18=10

4-(-11x-91)/6=10

24-(-11x-91)=60

24+11x+91-60

115+11x=60

11x=-55

x=-5.

c)

7x-3(x+1)=2x+15

7x-3x-3=2x+15

4x-3=2x+15

4x-2x=15+3

2x=18

x=9.

d)

2*[5(x+2)+9]=68

2*[5x+10+9]=68

2*[5x+19]=68

5x+19=68/2

5x+19=34

5x=34-19

5x=15

x=15/5

x=3.

e)

47-5(x+2)=3(x+5)-10

47-5x-10=3x+15-10

37-5x=3x+5

-5x-3x=5-37

-8x=-32

x=-32/-8

x=4.

Bafta!