315
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4x - 7 = 45 Therefore, 4x = 45 + 7 = 52 x = 52/4 x = 13
lcm(6, 7, 45) = 630. 6 = 2 x 3 7 = 7 45 = 3^2 x 5 lcm = 2 x 3^2 x 5 x 7 = 630
7/45 = 0.15555555...0.1555555... x 100 = 15.555555...%
67.5 x 15.5 x 45 x 13 x 7 = 4284393.75
the answer is 45 because 7 x 7 = 49