Solving by Substitution Single Variable

Solving for one variable by using an equivalent equation to represent the second variable

• System of Equations

• Elimination

• Intersection

• Substitution

When one of the equations has a variable with a coefficient of 1, the method most likely to be easiest to use is

• Graphing

• Substitution

• Elimination by Addition

• Elimination by Subtraction

Solve this system by substitution.

• (1, -4)

• (1, 4)

• (-4, -7)

• (-7, -4)

b - 2 = -7

9 = -2 + s

Solve the equation below:

• k = 152

• k = 176

• k = 5

• k = 27

If you have the equation y = 2x + 3, what can you substitute for y in the other equation?

• 2x + 3

• x + 3

• 2x

• 3

In the substitution method, what do you do after identifying the variables?

• Solve one of the equations for one variable in terms of the other

• Check the solution

• Graph the equations

• Eliminate one variable