Writing Equations.

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Presentation transcript:

Writing Equations

On an algebra test, the highest grade was 42 points higher than the lowest grade. The sum of the two grades was 138. Find the lowest grade.

On an algebra test, the highest grade was 42 points higher than the lowest grade. The sum of the two grades was 138. Find the lowest grade. Let x = lowest grade, so x + 42 is the highest grade.

The perimeter of a triangular lot is 74 meters The perimeter of a triangular lot is 74 meters. Side #2 is twice the length of the Side #1. Side #3 is 10 meters more than Side #1. Find the length of each side.

The perimeter of a triangular lot is 74 meters The perimeter of a triangular lot is 74 meters. Side #2 is twice the length of the Side #1. Side #3 is 10 meters more than Side #1. Find the length of each side. Let x = side #1, so side #2 = 2x, and side #3 = x + 10.