Drag a tile to move it. Tap or click an x tile without dragging to turn it. Keyboard: focus the workspace, press N to pick the next tile, arrow keys to move it, R to turn it.
The worked solution builds line by line here after you answer correctly or ask for it.
Your jobPick a polynomial on the left, then its factored form on the right. Six pairs per round. A wrong match adds 5 seconds. Beat your best time.
Fictional situations with practice numbers. The dose scenario is for learning the algebra only, not dosing guidance.
Wrong picks are fine here. Each one tells you why.