Question

Помогите решить уравнения, дам 10 б
1) -2x-$1frac{2}{5}$=6x-3
2)$frac{5}{x-3}=- frac{6}{13}$
3)$frac{3-2(1-x)}{4} = frac{5}{2}$

Answer 1

1)
$-2x-6x=-3+1.4 \ -8x=-1.6 \ x=0.2$

3)$frac{3-2+2x}{4} = frac{5}{2} \ \ frac{2x+1}{4} = frac{5}{2} \ \ 2(2x+1)=20 \ \ 4x+2=20 \ \ 4x=18 \ \ x=4.5$

2)
$frac{5}{x-3} =-frac{6}{13} \ \ 6(x-3)=-65 \ \ 6x-18=-65 \ \ 6x=18-65 \ \ 6x=-47 \ \ x=-7 frac{5}{6}$