# Determine whether the given problem is an equation or an expression. If it is an

Determine whether the given problem is an equation or an expression. If it is an equation, then solve. If it is an expression, then simplify.

$$\displaystyle\frac{{-{2}{x}}}{{7}}$$,$$\displaystyle\frac{{-{x}}}{{21}}$$,$$\displaystyle\frac{{-{5}{x}}}{{42}}$$

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Step 1
$$\displaystyle-{\frac{{{2}{x}}}{{{7}}}}-{\frac{{{x}}}{{{21}}}}-{\frac{{{5}{x}}}{{{42}}}}$$ is an expression because it is contains set of terms using the operation.
Step 2
Solve the above expression
$$\displaystyle\Rightarrow-{\frac{{{2}{x}}}{{{7}}}}-{\frac{{{x}}}{{{21}}}}-{\frac{{{5}{x}}}{{{42}}}}$$
$$\displaystyle\Rightarrow{\frac{{-{6}{\left({2}{x}\right)}-{2}{x}-{5}{x}}}{{{42}}}}$$
$$\displaystyle\Rightarrow{\frac{{-{12}{x}-{2}{x}-{5}{x}}}{{{42}}}}$$
$$\displaystyle\Rightarrow-{\frac{{{19}}}{{{42}}}}{x}$$