Đáp án+Giải thích các bước giải:
a) $\frac{x}{36}$ = $\frac{-2}{3}$+$\frac{5}{12}$
$\frac{x}{36}$ = $\frac{-1}{4}$
x : 36 = $\frac{-1}{4}$
x = $\frac{-1}{4}$ x 36
`x = -9`
b) -2/15 - x = 30%
x = $\frac{-2}{15}$ - 30%
x = $\frac{-13}{30}$
c) -4$\frac{4}{5}$ + $\frac{1}{3}$ : x = $\frac{-5}{6}$
$\frac{-24}{5}$ + $\frac{1}{3}$ : x = $\frac{-5}{6}$
$\frac{1}{3}$ : x = $\frac{-5}{6}$ - $\frac{-24}{5}$
$\frac{1}{3}$ : `x = 119/30`
x = $\frac{1}{3}$ : `119/30`
`x = 10/119`
$@chienbinhkieuhanh$
