👤
Ungana
a fost răspuns

Rezolvati ecuatiile:

a) 3 ( x-1) = x+7
b) 2 ( x+3 - 5=x-7
c) 5x - 3 (x-1) = 4-x
Va rog !! Ajutat-ma!! :**

Răspuns :

Denisacorina00
a) 3x -3 = x + 7 3x - x = 7 + 3 2x = 10 ( :2 ) x=5 b) 2x + 6 -5 = x - 7 2x +x = -7 + 1 3x = -6 ( :3 ) x = -2 c) 5x - 3x -3 = 4-x 2x + x = 4 + 3 3x = 7 ( :3 ) x = 7 pe 3.

a) 3(x-1)=x+7    b) 2(x+3)-5=x-7       c)  5x-3(x-1)=4-x

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

2x=10                    2x+1=x-7                  2x+3=4-x 

x=5                        x=(-8)                        3x=1 

                                                               x=1/3

Alte intrebari