Write 81 more than x as an algebraic expression

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 =

Nikolas calculated the volume of the prism. his work is shown below.

Tatiana reads 40 pages of her book every night for x number of nights. write an expression that shows the number of pages she has read