I need help with this question its due today and I don't understand it. It takes Cindy 3/4 of an hour to complete a puzzle. How many puzzles can Cindy finish in 3 hours?

How do i do this activity, is appreciated

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 =

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate.true or false?