Drag objects onto the plates. Find different ways to balance the scale; each object type always has the same value.
SoundModel notes
The scale represents algebraic values, including negative numbers. It is not a physical mass balance.
Opposite terms cancel; the tilt saturates at 22°. Equality uses the exact value on each side.
The original simulation Equality Explorer 1.2.4 model uses exact fractions. Multiplying both sides by zero can lose information, so the game excludes it.