what is 10(x-3)=9(a) ​?

what is 10(x-3)=9(a)?

$10\times (x-3)= 9\times (a)$

$10x-30=9a$         [ + 30

$10x=9a-30$         [ / 10

$x=0.9a-3$         !

$10x-30=9a$          [ / 9

$\frac{10}{9}x-\frac{30}{9}=a$           [ turned around

$a= 1\frac{1}{9}\ x-3\frac{1}{3}$      !