What is the equation of the line?

Which expression calculates the speed in meters per second of an object that travels a distance of 100 m every 20 seconds

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 =

If 3x+8=3x+8 is it one solution or no solution