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1°)
$8x = 32$
$\dfrac{\cancel8x}{\cancel8} = \dfrac{\cancel{32}^4}{\cancel8_1}$
$x= 4$
2°)
$-18x = 6$
$18x = -6$
$\dfrac{\cancel{18}x}{\cancel{18}} = -\dfrac{\cancel6^1}{\cancel{18}_3}$
$ x = -\dfrac{1}{3}$
3°)
$ 9x = -36$
$\dfrac{\cancel9x}{\cancel9} = -\dfrac{\cancel{36}^4}{\cancel9_1}$
$x= -4$
65a
x = 32/8 = 4
65b
x = -6/18 = -1/3
65c
x = -36/9 = -4