  # Yukang

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Lepton
1. ## Problem Solving (Fated to earn money) Question that has no explanation yet

Ok, my bad about day 1 income being twice as big as day 2, you're right. The question asks for the minimum on day 1, so I guess I look for the minimum of the range of values? I never done this type of math before. Are you saying all 9 variables will have a range of values for solutions and the answer would be the minimum of A1 + B1 + C1? You helped a lot, thanks, but I still don't know what to do to reason through it 100%. There is only one answer right, because it asks for the minimum on day 1? I also have no idea how to find a range of solutions for 8 equations with 9 unknowns, although I know how to find solutions for 9 equations with 9 unknowns.
2. ## Problem Solving (Fated to earn money) Question that has no explanation yet

Thanks, that looks about right. Looks like 8 equations with 9 unknowns after you throw away the C4 & C5 variables? Is 8 equations with 9 unknowns solvable? I thought you need 9 equations? This is assuming the 3 way equal equation can be arranged into 3 equations: I think the 3 way equal equations may be reversed in their coefficient though 4(A1 + B1 +C1) = 2(A2 + B2 + C2) 2(A2 + B2 + C2) = (A3 + B3 + C3) 4(A1 + B1 +C1) = (A3 + B3 + C3) How can you solve 8 equations with 9 unknowns? (A1, A2, A3, B1, B2, B3, C1, C2, C3) I know from guess and check A1 = 7, A2= 18, A3 = 0, B1 = 26, etc. (and the rest can be filled out), but isn't it strange there are only 8 equations?
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