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Home > CC2MN > Chapter 7 > Lesson 7.1.2 > Problem 7-20
7-20.
Write the following expressions in two ways, one with parentheses and one without. For example,
A number reduced by
, then multiplied by . Reducing by
means you first need to subtract from a number. Call the unknown number .
Then you will multiply that value by. A number reduced by
: Then multiplied by
: Use the Distributive Property to multiply every term inside the parentheses by
. A number increased by
, then multiplied by . See part (a).
Ten times a number, then add twenty.
Ten times a number is
.
Then add twenty to that to get:Since
is a factor of both terms, you can factor out a to get the following expression: Check your answer by using the Distributive Property.