Equations-proportions-percents-filled

# Equations-proportions-percents-filled - Math 2303 Solving...

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Math 2303 Solving Equations In this lesson, we’ll review some techniques for solving equations and tackle the first of the application problems. Let’s solve some equations. In each example, solve for x. Example 1: 7 9 12 x - = Example 2: 4 5 x = Example 3: 9 7 2 x + =

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Example 4: 4(2 3 ) 8 x - = Example 5: ( 29 3 2 4 9 x - - =
Example 6: 2 1 5 3 2 4 x - = Example 7: 2 9 6 3 x x - = +

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Example 8: 2 5( 3) 4 2(1 ) x x x - - = + - Example 9: 3( 4) 2 6 2( 3) x x x x - + + = - +
Example 10: 3( 2) 5( 3) 2 21 x x x + - - = - + Proportions A proportion is a statement of equality between two fractions. You can use cross- multiplying to help you solve equations of this type. If , then , provided 0, 0. a c ad bc b d b d = = Example 11: 2 5 7 9 x =

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Example 12: 4 7 3 2 x x + - = You can use proportions to solve problems. Example 13: The cost for water in Houston is \$4.05 per 750 gallons used. What should be the bill for 12,500 gallons used?
Example 14: Insulin comes in 10 cubic centimeter (cc) vials labeled in the number of

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Equations-proportions-percents-filled - Math 2303 Solving...

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