Simplify the following:

$\frac{6x}{2}-\frac{7x}{2}$6x2−7x2

Consider the algebraic fractions $\frac{2m}{5}$2m5 and $\frac{4m}{6}$4m6.

Simplify the following: $\frac{x}{5}+\frac{4x}{7}$x5+4x7

Simplify the following: $\frac{3x}{5}-\frac{x}{7}$3x5−x7