Question

Change the subject of the formulae to b::: 8a + 3b = 12. And 3b^2=27

Answer 1

8a + 3b = 12
3b = 12 - 8a

$b = \frac{12-8a}{3}$


And...

3b^2 = 27
b^2 = 9
$b = \pm 3$
b = 3
b = -3