Question

|x|-(-9)^3=-100 3x-(-10)=2x+50

Answer 1

a) Ta có: \(\left|x\right|-\left(-9\right)^3=-100\)

\(\Leftrightarrow\left|x\right|-\left(-729\right)=-100\)

\(\Leftrightarrow\left|x\right|+729=-100\)

\(\Leftrightarrow\left|x\right|=-100-729=-829\)(vô lý)

Vậy: \(x\in\varnothing\)

b) Ta có: \(3x-\left(-10\right)=2x+50\)

\(\Leftrightarrow3x+10-2x-50=0\)

\(\Leftrightarrow x-40=0\)

\(\Leftrightarrow x=40\)

Vậy: x=40