Answer:
x = 3
Explanation:
So you will distribute the number beside the ( ) 
so the equation be looking like :
18x - 8x = 10x + 5 - 2 
now combine like terms
18x - 8x = 10x 
5 - 2 = 3
10x = 10x +3 
now subtract 10x to the other side they cross off
leaving x = 3 
and so that's your answer
hope this helps