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Rewriting Equations with Variables


A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Overview

We can use what we know about solving for unknown numbers to rewrite equations involving variables. This can be much simpler than plugging in a set of numbers.

For example…

Rewrite the equation  y + 3 = x  to solve for  y

We can use the relationship between addition and subtraction to solve for y

y + 3 = x

Move the 3 across the equal sign (=). When we do that, the addition operation
changes to subtraction.

 

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