stefan-lee_609dba8e0aabe
stefan-lee_609dba8e0aabe
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P = Idade de Pedro M = Idade de Mário P = 2M P + 20 - 10 = M + 20 P + 10 = M + 20 2M - M = 20 - 10 M = 10 P = 2M P = 2 · 10 P = 20