167 BPM
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4/4 ×2
Drag rhythmic values into up to 8 beat blocks per line to build a drum groove, or click a tile then click a block to place it — handy on a trackpad.
Math skill: Solve a 3x3 System Using Row Operations
How the beat teaches it: Every slot gives three equations in x, y, and z — this time, solve using row operations (add or subtract a multiple of one equation from another) to reduce the system step by step until one variable falls out. Build that many notes anywhere in the kit.
This is lesson 18 of 24 in RockBlocks Math, College Algebra, a free course where every lesson turns a math idea into something you can count, hear, and play. The previous lesson, “Solving a System With Cramer's Rule,” covered use Determinants to Solve a 2x2 System. Next is Lesson 19, “Standard Form of a Parabola.”
Every slot above (A, B, C, D) is its own question, and it’s a real, blank RockBlocks beat the whole time — the same drag-and-drop tiles, kit, tempo, sheet music, and drummer view as anywhere else on the site. Tap ❓ Questionin the corner to read the current slot’s problem, build your answer right in the grid, then tap ✓ Check Answerto grade it. Once you’re done, keep going: expand the beat, drop it into a Stack, or save a copy to your own page — nothing here overwrites the lesson itself, so every visitor still starts from the same blank slots.