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56 + 9 = 65
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2(x+9)=56 2x+18=56 -18 -18 2x=18 x=9 check: 2(9+9)=56 2(18)=56 56=56 :)
the only multiples of 5 are 30.35.40.45.50, and 55 the only sum to 9 is 45
243+56 = 299
56 + 64 = 120
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