Question

am nevoie urgent va roggg frumos cu rezolvare completa​

Answer 1

a) x-2 = -63:9

x-2 = -7

x = -7+2

x = -5

b) 5x+15 = 10x-10

5x-10x = -10-15

-5x = -25

x = 25:5 = 5

c) 8x+2 = 10x-14

8x-10x = -14-2

-2x = -16

x = 8

d) -2x+10 = -24x-16+56

-2x+24x = 40-10

22x = 30

x = 30/22 = 15/11

e) 1-4*[-5x+10] = 21

-4*[-5x+10] = 21-1

-5x+10 = 20:4

-5x = 5-10

-5x = -5

x = 1

f) 5x-10-7x-21+35 = 0

-2x+4 = 0

-2x = -4

x = 2

g) Produsul a doua paranteze egalate cu 0, va rezulta doua solutii

x+3 = 0⇒ x = -3

x-7 = 0 ⇒ x = 7

h) -2x+6 = 0 ⇒ -2x = -6 ⇒ x = 3

x+3 = 0 ⇒ x = -3