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How do you work out 5a plus 7 equals 9? Put in equation form

5a+7=9 subtract 7 from both sides gives you 5a=2

divide 5 from both sides gives you a=2/5 or .4
substitute in .4 for your a to check answer

5(.4)+7=9

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14y ago
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Q: How do you work out 5a plus 7 equals 9?
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