amira101
valuate 3(2m − 3n) − 2(m + 2n) for m = −9 and n = −7.



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Turner
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6m  9n  2m  4n
6(9)  9(7)  2(9)  4(7) =
54 + 63 + 18 + 28 = 55

amira101
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thank you so much!

Turner
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no problem(: