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.