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boyakko [2]
3 years ago
11

Identify the property used in the first four steps to solve this equation.

Mathematics
1 answer:
vovikov84 [41]3 years ago
7 0

Step 1: Distributive Property

Step 2: Subtraction Property of Equality

Step 3: Addition Property of Equality

Step 4: Division Property of Equality

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We know that the sum of the inner angles of any triangle is 180º

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The sum of the external angle (9y + 1)º with inner angle (3x + 5) = 180 °, <span>Replace the measure of "x" found:
</span>
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