\displaystyle [br]\begin{align*}0 < 3x - 10 < 180 &\Rightarrow 0 + 10 < 3x -10 + 10 < 180 + 10\\& \Rightarrow 10 < 3x + 0 < 190 \\&\Rightarrow 10 < 3x < 190 \end{align*}
\displaystyle [br]\begin{align*}0 < 3x - 10 < 180 &\Rightarrow 0 + 10 < 3x -10 + 10 < 180 + 10\\& \Rightarrow 10 < 3x + 0 < 190 \\&\Rightarrow 10 < 3x < 190 \end{align*}
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