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Equations
DEFINITION: a statement that the values of two mathematical expressions are equal (indicated by the sign =). HOW TO: 5 + 2 = 7 4 + 3 = 5 + 2 Both equal 7 so this is called an equation. Everyday Use: Equations are used when determining if two things are equal.
Proportion
Proportion Definition: A statement of equality between two ratios in which the first of the four terms divided by the second equals the third divided by the fourth (as in 4/2=10/5) HOW TO: Solving proportions is simply a matter of stating the ratios as fractions, setting the two fractions equal to each other, cross-multiplying, and solving the resulting equation Khan Link: https://www.khanacademy.org/math/pre-algebra/pre-algebra-ratios-rates/pre-algebra-write-and-solve-proportions/v/writing-proportions