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Equations & Systems

Level 23 / realistic untimed

3-var Cramer - find x (mastery)

4 visual steps / 3-var Cramer find x

1. Coefficient D

Read x window from the same equations.Db3-2541-3-261172-21same equationsDx17-2521-3-2161D = 183Dx = 366x = 2
D = 183.

D = 183.

2. Target Dx

Read x window from the same equations.Db3-2541-3-261172-21same equationsDx17-2521-3-2161D = 183Dx = 366x = 2
Dx = 366.

Dx = 366.

3. x ratio

Read x window from the same equations.Db3-2541-3-261172-21same equationsDx17-2521-3-2161D = 183Dx = 366x = 2
x = 2.

x = 2.

4. Check

Read x window from the same equations.Db3-2541-3-261172-21same equationsDx17-2521-3-2161D = 183Dx = 366x = 2
Substitute into one equation.

Substitute into one equation.

Practice Level 23

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

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