Question

Помогите прошу дам 12б!!!
Найдите корень уравнения:
1. 5.6- 3(2-0.4х)= 0.4(4х+1)

Answer 1

5.6- 3(2-0.4х)= 0.4(4х+1)
5.6 - (3*2-3*0.4x)=0.4*4x+0.4*1
5.6 - (6-1.2x)=1.6x+0.4
5.6 - 6+1.2x=1.6x+0.4
-0.4+1.2x=1.6x+0.4
1.2x-1.6x=0.4+0.4
-0.4x=0.8
x=-2