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Solving Equations: Keep the balance
with properties of equality.
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Let a, b, c be real numbers.
Addition Property of equality:
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Subtraction Property of equality:
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Multiplication Property of equality:
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Division Property of equality:
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Ex. 1 Solve the equation, justify each step:
x + 12 = 18
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Ex. 2 Solve the equation, justify each step:
5x – 1 = 21
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