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5 (p + 1) + 3 = 18
5p + 5 + 3 = 18
5p = 18 - 5 - 3
5p = 10
p = 10 ÷ 5
p = 2 → respuesta
5 (p + 1) + 3 = 18
5p + 5 + 3 = 18
5p + 8 = 18
5p = 18 - 8
5p = 10
p = 10/5
p = 2
Respuesta.
p = 2
COMPROBAMOS LA SOLUCIÓN
5 (p + 1) + 3 = 18
5 (2 + 1) + 3 = 18
5 (3) + 3 = 18
15 + 3 = 18
18 = 18
La solución es correcta!