Question

Rezolvați : a) 4(2-×)=×-2; b)2[21-3(5-2×)]=0​

Answer 1

Răspuns:

a)4(2-x)=x-2

8x-4x=x-2

4x=x-2

4x-x=-2

3x=-2

x=-2/3

b2[21-3(5-2x)]=0

2(21-15+6x)=0

2(6+6x)=0

12+12x=0

12x=-12

x=-12/12=-1