What does x equal in the problem,

10x+8=8x - (-16)

10x+8=8x - (-16)

10x+8=8x+16

move 8x to the other side

sign changes from + 8x to - 8x

10x-8x+8=8x-8x+16 (combine like terms)

2x+8=16

move 8 to the other side

2x+8-8=16-8

2x=8

divide both sides by 2 to get x by itself

2x/2=8/2

answer;

x=4