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Equations & Systems

Level 18 / realistic untimed

3-var Cramer - find y (small)

4 visual steps / 3-var Cramer find y

1. Coefficient D

Read y window from the same equations.Db1112-1112-1632same equationsDy16123112-1D = 7Dy = 14y = 2
D = 7.

D = 7.

2. Target Dy

Read y window from the same equations.Db1112-1112-1632same equationsDy16123112-1D = 7Dy = 14y = 2
Dy = 14.

Dy = 14.

3. y ratio

Read y window from the same equations.Db1112-1112-1632same equationsDy16123112-1D = 7Dy = 14y = 2
y = 2.

y = 2.

4. Check

Read y window from the same equations.Db1112-1112-1632same equationsDy16123112-1D = 7Dy = 14y = 2
Substitute into one equation.

Substitute into one equation.

Practice Level 18

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

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