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2 answers:
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multiply all terms in the second equation by 2 to get the coefficient on the y variable to be -6.
Answer:
$50
Step-by-step explanation:
If the original price was $10 more than the sale price, so we know that in this case, 20% = $10. Because 20% is equivlalent to , multiply $10 by 5 to get the answer of $50.