21 do the opposite of what u have to do to 6 to get 8
If he was 32 eight years ago, then now he is 32+8=40.
So x years ago he was 40-x.
The answer is 6.
Let's first simplify the expression:
3 · 2x = 6x
Now, the coefficient (k) is a number that stands right before x:
kx
Let's see what is the coefficient:
kx = 6x
So, k = 6