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Step-by-step explanation:
<h3>hope it helps.</h3><h3>stay safe healthy and happy.</h3>
Answer:

Step-by-step explanation:

Using the formula above,
slope of line

Sometimes you have to simplify fractions after doing arithmetic with them. Cross-cancellation is a simplification that can be done before. simplifying before means when you do multiply, you'll have smaller numbers, and smaller numbers are easier to work with.