Bài 84: Tìm x, biết:a) $x+\frac{6}{23}+(-0.7)+\frac{17}{23}=0$b)$\left | x\right ...

Bài 84: Tìm x, biết:

a) $x+\frac{6}{23}+(-0.7)+\frac{17}{23}=0$

b)$\left |  x\right |-\frac{1}{2}=\frac{9}{2}$

c) $2x+\sqrt{0.81}-\left | \frac{-5}{4} \right | /(-\frac{1}{2})^{2}=-0.1$

d*)$\left | x \right |+\left |  x+1\right |= -\frac{3}{4}$