Explicación paso a paso:
180(5-2) → 180(3) = 540
130 + 140 + 70 + 2X + 2X = 540
340 + 4X = 540
4X = 200
X = 50
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Explicación paso a paso:
180(5-2) → 180(3) = 540
130 + 140 + 70 + 2X + 2X = 540
340 + 4X = 540
4X = 200
X = 50