Question

8a + (- 5a - 9) = 3a + [- 5a - (a + 3)]​

Answer 1

Ecuaciones de primer grado:

$8a+(-5a-9)=3a+ [- 5a - (a + 3)]\\8a+(-5a-9)=3a+[-5a-a-3]\\8a+(-5a-9)=3a+[-5a-a-3]\\8a-5a-9=3a-5a-a-3\\8a-5a+5a-3a+a=9-3\\6a=6\\a=\frac{6}{6}\\a=1$

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