Question

Решите, пожалуйста, даю 24 балла

Answer 1

(12.5 - x) / 5 = (3.6 + x) / 6
6 * (12.5 - x) = 5 * (3.6 + x)
75 - 6x = 18 + 5x
57 = 11x
x = 57 / 11 = 5$frac{2}{11}$

(4$frac{3}{8}$x + 5$frac{1}{16}$) * $frac{4}{15}$ = $frac{5}{12}$x + 2$frac{2}{5}$
$( frac{35}{8}x + frac{81}{16} ) * frac{4}{15} = frac{5}{12}x + frac{12}{5}$
$frac{140}{120}x + frac{324}{240} = frac{5}{12}x + frac{12}{5}$
9x/12 = 252/240
x = 252/180 = 1.4 = $1 frac{2}{5}$

Answer 2

спасибо

Answer 3

3x/4 - 0.5 + x + 1.5 - 2.5x + 2 = 0

Answer 4

0.75x + x - 2.5x = - 1.5

Answer 5

- 0.75x = -1.5

Answer 6

x =2