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Order of Operations with Substitution

In this video, we will be learning how to use order of operations (PEMDAS) in word problems involving substitution.

For example:

3x + 4y^2 - 8z

Let x = 5, y = -2, z=3

Substitute first into parenthesis:    3(5) + 4(-2)^2 - 8(3)

Evaluate the exponent:                    3(5) + 4(4) - 8(3)

Multiply:                                              15 + 16 - 24

Addition/Subtraction:                      31 - 24

Simplify:                                               7

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