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If I understand the question correctly: 2x=39 then x=39/2 or x=19.5
2x+3=9 x
4x-39 = 2x+3, 4x-2x = 42 x=21
Instead of just giving you the answer, I will do steps. First: Let "x" be the number Therefore, 2x = 78. x = 78/2 x = 39 The number is 39
46