Question

8. Adevărat sau fals? a) 2x - 9=x2x + x =9; c) 5x+1= x-15x - x=0; A F​

Answer 1

Răspuns:

Explicație pas cu pas:

a) 2x - 9 = x

2x - x = 9

x = 9

b) 2x + x = 9

3x = 9

x = 3

c) 5x + 1 = x - 15

5x - x = -15 - 1

4x = - 16

x = -4

d) x - x = 0

0x = 0

x ∈ R