Question

Rezovati ecuatia:$\frac{3-2x}{4}=\frac{4}{5}[0,8(3)-0,75x]$ unde x∈Q.Dau coroana

Answer 1

Răspuns:

Explicație pas cu pas:

0,8(3) = (83 - 8)/90 = 75/90 = 5/6

0,75 = 75/100 = 3/4

(3 - 2x)/4 = 4/5 (5/6 - 3x/4)

3/4 - x/2 = 4/6 - 3x/5

3/4 - 4/6 = x/2 - 3x/5

9/12 - 8/12 = 5x/10 - 6x/10

1/12 = -x/10

x = -10/12 = -5/6