1. Simplifica: a. 3a + 2a = b.-7b-5b = c. a - 9a = d.-240 - 150 + 390 = a. Sa, -12b, -8a, o b. 4a, 12b-7a, 0 C. 3a, -12b, -8a, 90
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Respuesta:
Aquí las respuestas:
a. 5a
b. -12b
c. -8a
d. 0