# Math Help - Find the inverse

1. ## Find the inverse

Find the inverse of the following function y = 7-3x

I got:

y-7 = -3x
y-7/3 = x
-x-7/3 = y

End.

2. You need to divide through by $-3$

$y = 7-3x$ swap $x$ and $y$, then make $y$ the subject

$x = 7-3y$

$x - 7= -3y$

$\frac{x - 7}{-3}= y$

$y=\frac{x - 7}{-3}$

$y=\frac{-x }{3}+\frac{ 7}{3}$