Question

Реши уравнения:
$- 1.4 - (5.7 - x) = - 3.6 \\ 2 \frac{5}{6} - ( - y + 7) = - 8 \ \frac{1}{2}$

Answer 1

1)
-1,4-(5,7-x)=-3,6
-1,4-5,7+x=-3,6
x=-3,6+1,4+5,7
x=10,7

2)
$2 \frac{5}{6} - (-y+7) = -8\frac{1}{2}$
$2 \frac{5}{6} + y-7 = -8\frac{1}{2}$
$y= -8\frac{1}{2} - 2\frac{5}{6} + 7$
$y= - \frac{17*3}{2} - \frac{25}{6} + \frac{7*6}{1}$
$y= \frac{-51-25+42}{6} = - \frac{34}{6} = -5\frac{4}{6}$