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La medida es "x"
2/3 de 1/2 x = 15
2/3 * 1/2 = 2/6 = 1/3
1/3 x = 15
x = 15 ÷ 1/3
x = 45
R/ La medida es 45
2/3 * x/2 = 15
2x/6 = 15
2x = 15(6)
2x = 90
x = 90/2
x = 45