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lina006:
1.Write a proof for the conjecture using the contrapositive if 5x+7=-13,then x =-4.
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jhonyy9:
do you know what mean ,,contrapositive" ?
jordangantt12:
5(-4)+7=-13 -20x+7=-13 subtract 7 from both sides and get: -20x=-20 divide -20 on both sides and get: x=1
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