During the 2 9-weeks reporting, a student's grade increased from 80 to 96. By what percentage did the grade increase? 32%
20%
16%
12%

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 =