Evaluate 7w - 14 when w =8

Show two ways to find the same value of the expression and make sure that one way uses distributive property.

The value for  7w - 14  when w =8 is 42.

Step-by-step explanation:

First method is directly substituting the value:

Equation:   7w - 14 , for w= 8,

               = 7w - 14 = 7*8 - 14 = 42.

Using distributive property :

The distributive property lets you multiply a sum by multiplying each addend separately and then add the products.

Equation:   7w - 14

               = 7(w-2) , for w=8,

               = 7(8-2)

               =7*8 - 7*2

               =56 - 14

               =42.

-22

times both sides by 2, times () by 8, add alile terms, move terms, add alike and caculate divide both sides by 3

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