Skip to content

Learn

Equations & Systems

Level 30 / realistic untimed

3-var realistic - find z (no timer)

3 visual steps / realistic 3-var find z

1. Coefficient D

1. Coefficient DKeep the source equations visible.
Question
1. Find DUse the coefficient columns.
Fade the RHS column; read x, y, z in place.
Current determinant
D = -1440.

D = -1440.

2. Target Dz

2. Target DzKeep the source equations visible.
Question
2. Find D_zPut the right-hand side in the z column.
Fade z; keep the other columns and RHS in place.
Current determinant
Dz = -57600.

Dz = -57600.

3. z ratio

3. z ratioKeep the source equations visible.
Question
3. Read zDivide D_z by D.
z = 40.

z = 40.

Practice Level 30

Keep the columns in place and solve one window at a time.

Start Level