Question

If 3a + 1 = 2/3, evaluate :
3a
(1) 3a-1
(ii)9a2 +
(ii) 81a + 2a​

Answer 1

$3a + 1 = \frac{2}{3}$

$a = - \frac{1}{9}$

1) 3a-1

$= 3 \times \frac{ - 1}{9} - 1$

$= \frac{ - 4}{3}$

2)

$9a {}^{2} = 9 \times \frac{1}{9}$

3)

81a+2a

$= \frac{ - 83}{9}$

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