6x + 14 - (8x + 4) = 6x + 14 - 8x - 4 = -2x + 10

Simplify the left side by removing the parentheses:

(6x - 8x) + (14 - 4) = -2x + 10

Combine like terms: -2x + 10 = -2x + 10

This is an identity, true for all values of x.