remember, you can do anything to an equation as long as you do it to both sides
translation of the problem:
16+4x (16+4x) is (=) 10 more than (10+) 14 (14)
16+4x=10+14
combine like terms
16+4x=24
minus 16 from both sides
4x=8
divide both sides by 4
x=2
so
8x=8 times x=8 times 2=16
8x=16