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Answer: 63 Solution: 3 x 14 + (3 x 7) = 42 + 21 = 63
If you mean using numbers 2, 3 and 7 then one solution is :- 32 x 7 = 9 x 7 = 63
There's no solution. For two primes to add to an odd number, one of them would have to be two. 63 isn't prime, so there's no solution.
63, 65, 67, 69 = 264 so there does not appear to be a solution in whole numbers!
Without any equality signs the given expressions can't be considered to be equations.