Respuesta:
5
Explicación paso a paso:
3x = 15
x = 15 ÷ 3
x = 5
prueba
5 × 3 + 6 = 21
15 + 6 = 21
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Respuesta:
5
Explicación paso a paso:
3x = 15
x = 15 ÷ 3
x = 5
prueba
5 × 3 + 6 = 21
15 + 6 = 21