Question

rezolvati ecuațiile : 12+x=20, - 3x+2=x-6, x+3 supra 2 =x-3 supra 5​

Answer 1

Răspuns:

12+x=20

x=20-12

x=8

______________

- 3x+2=x-6

-3x-x=-6-2

-4x=-8

x=8:4

x=2

_____________

(x+3)/2 =(x-3)/5​

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

5x+15=2x-6

5x-2x=-6-15

3x=-21

x=-21:3

x= -7