Question

ajutor.
va rog
dau coroana

exercițiul 6.
rezolvare completă.​

Answer 1

Răspuns:

a) 9x-63=-63

9x=0

x=0

b) 5x+15=3x-15

2x=-30

x=-30÷2=-15

c) -2x+8= -3x-3+23

-2x+8= -3x+20

-2x+3x=20-8

x=12

d) 1-2×(3-4+x)=-7

1-2×(-1+x)=-7

1+2-2x=-7

-2x=-7-3=-10

x=-10÷-2=5

e) 2x+12-5+3x=-2x+18+3

5x+7=-2x+21

7x=14

x=2

f) 225/(x-3)=-15

225=-15x+45

-15x=225-45

-15x=180

x=180/-15=-12