The equation is an identity.
Work Step by Step
Distribute through the parenthesis. $0.3x+0.6-0.5x-1=-0.2x-0.4$ Add/Subtract like terms. $-0.2x-0.4=-0.2x-0.4$ Add $0.2x$ and $0.4x$ to each side. Because you are left with the equal constants, any value of $x$ will satisfy the given conditions, the fore making the equation an identity. $0=0$