Question

-3x-15+9x-x=5-x+16

7x-6+5x-4=2-3x-4-x

2y+18-5y+4y=28-3y+14

Cu tot cu verificare pls

Answer 1

- 3 x - 15 + 9 x - x = 5 - x + 16

5 x + x  = 21 + 15

6 x = 36

x = 36 : 6

x = 6

Verific:  

5 x - 15 = 21 - x

5 · 6 - 15 = 21 - 6

30 - 15 = 15 ( corect )

____________________

7 x - 6 + 5 x - 4 = 2 - 3 x - 4 - x

12 x - 10 = - 4 x - 2

12 x + 4 x = - 2 + 10

16 x = 8

x = 8 / 16

x = 1 / 2

Verific:

12 x 1 / 2 - 10 = - 4 × 1 / 2 - 2

6 - 10 = - 2 - 2 = - 4

__________________________

2 y + 18 - 5 y + 4 y = 28 - 3 y + 14

y + 18 = 42 - 3 y

y + 3 y = 42 - 18

4 y = 24

y = 24 : 4

y = 6

Verific:

y + 18 = 42 - 3 y

6 + 18 = 42 - 3 x 6

24 = 42 - 18 ( corect )