Factor 0.04m^2 - n^2. Please help

Follow these steps using the algebra tiles to solve the equation −5x + (−2) = −2x + 4. 1. add 5 positive x-tiles to both sides and create zero pairs. 2. add 4 negative unit tiles to both sides and create zero pairs. 3. divide the unit tiles evenly among the x-tiles. x =

Could somebody me with this radical simplification?

Which expression is equivalent to -5(3x - 6/7)