Question

решите уравнения: -3(2x-0.8)=2(x+3.6), 1(целая)2/3x-4/9=1(целая)5/6x-0.5

Answer 1

-3(2x-0,8)=2(x+3,6)
-6x+2,4=2x+7,2
-6x-2x=7,2-2,4
-8x=4,8
x=$\frac{4,8}{-8} =-0,6$

$1 \frac{2}{3} x- \frac{4}{9} = 1 \frac{5}{6} x-0,5$
$\frac{5}{3} x - \frac{4}{9} = \frac{11}{6} x - \frac{5}{10}$
$\frac{5}{3} x - \frac{11}{6} x = - \frac{5}{10} + \frac{4}{9}$
$\frac{10x-11x}{6} = \frac{-45+40}{90}$
$- \frac{x}{6} = - \frac{5}{90}$
$- \frac{x}{6} =- \frac{1}{18}$ |*(-1)
$\frac{x}{6} = \frac{1}{18}$
18x=6
x=$\frac{6}{18} = \frac{1}{3}$