The answer is 97.
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1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 + 11 + 12 = 78
2 + 5 + 3 + 3 = 13
156/2, 234/3, 312/4, and 390/5 Solution Method: 1. To find equivalent fractions, simply multiple the original fraction (78/1) by a fraction that is equal to 1 (for example 2/2 or 3/3, 100/100, etc) as follows: 78/1 * 2/2 = 156/2 78/1 * 3/3 = 234/3 78/1 * 4/4 = 312/4 78/1 * 5/5 = 390/5
factorization: 78=2*3*13 65=5*13 LCM=2*3*5*13=390
7/2 + 43/10 = 35/10 + 43/10 = 78/10 = 39/5 7 and 4 over 5