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Chapter A.2, Problem 32E
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### Elementary Geometry For College St...

7th Edition
Alexander + 2 others
ISBN: 9781337614085

#### Solutions

Chapter
Section
BuyFindarrow_forward

### Elementary Geometry For College St...

7th Edition
Alexander + 2 others
ISBN: 9781337614085
Textbook Problem

# In Exercises 21 to 32, solve each equation. ( n − 2 ) ⋅ 180 n = 150

To determine

To solve:

The given equation.

Explanation

Properties of equation solving:

1) Addition Property of Equality (ifÂ a=b,Â thenÂ a+c=b+c): An equivalent equation results when the same number is added to each side of an equation.

2) Subtraction Property of Equality (ifÂ a=b,Â thenÂ aâˆ’c=bâˆ’c): An equivalent equation results when the same number is subtracted from each side of an equation.

3) Multiplication Property of Equality (ifÂ a=b,Â thenÂ aâ‹…c=bâ‹…cÂ forÂ câ‰ 0): An equivalent equation results when each side of an equation is multiplied by the same nonzero number.

4) Division Property of Equality (ifÂ a=b,Â thenÂ ac=bcÂ forÂ câ‰ 0): An equivalent equation results when each side of an equation is divided by the same nonzero number.

Calculation:

Given: (nâˆ’2)â‹…180n=150

Multiply both sides by n, we get

(nâˆ’2)â‹…180nÃ—n=150Ã—n(nâˆ’2)â‹…180=150n180nâˆ’2â‹…180=150n180nâˆ’360=150n

Addition Property of Equality

Add 360 to both sides

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