(6,5 -1,3x)×4/13=(0,8-3x)÷6/7

Question

(6,5 -1,3x)×4/13=(0,8-3x)÷6/7

Answer 1

Выражение: (6.5-1.3*x)*(4//13)=(0.8-3*x):(6//7)
Ответ: (16//15)+3.1*x=0
Решаем по действиям:1. (6.5-1.3*x)*(4//13)=2-0.4*x  (6.5-1.3*x)*(4//13)=6.5*(4//13)-1.3*x*(4//13)  1.1. 6.5*(4//13)=2  1.2. 1.3*(4//13)=0.42. (0.8-3*x):(6//7)=0.8/(6//7)-3*x/(6//7)3. 0.8/(6//7)=(14//15)4. 3/(6//7)=3.55. 2-0.4*x-((14//15)-3.5*x)=2-0.4*x-(14//15)+3.5*x6. 2-(14//15)=(16//15)7. -0.4*x+3.5*x=3.1*x