The steps to solve the given equation for $x$ are shown below.

Given:	$10+8 x=18+4 x$
Step 1:	$10+8 x+(-4 x)=18+4 x+(-4 x)$
Step 2:	$10+4 x=18+0$
Step 3:	$10+4 x=18$
Step 4:	$(-10)+10+4 x=(-10)+18$
Step 5:	$0+4 x=8$
Step 6:	$4 x=8$
Step 7:	$4 x \cdot \frac{1}{4}= 8 \cdot \frac{1}{4}$
Step 8:	$x=2$

Select the property which is being used to write step 2.

Aadditive identity property

Bassociative property

Cinverse property of addition

Dmultiplicative identity property