Multiply each side by x, leaving you with 3-6/10+4, then solve to get -3/14
Hope this helps :)
We sketch the two similar shapes and they are as shown in the attachment. We want to write corresponding side's length in ratio


Writing the two ratio as fraction gives

Cross multipliying gives
Absolutely not because
if you see as fraction
8/7 and 15/16 is not equal at all
if it had to be equal if should've been 16/14
E. Commutative property of multiplication