# Substitution Method

### Solving Systems of Equations by the Substitution Method

1. Work out the value of an unknown in one of the equations.

2.Substitute the expression of this unknown in the other equation, obtaining an equation with one unknown.

3. Solve the equation.

4. The value obtained is substituted into the other equation.

5. The two values obtained are the solution of the system.

1Work out the value of x.

2Substitute into the other equation the value of x:

3 Solve the equation obtained:

4Substitute the value obtained.

5Solution:

#### Examples

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