Your answer is 2x+118. Here is how I got it.
So we need to simplify the problem by first removing the parenthesis to get this
4x+3+115-2x
Now we need to add the numbers 3+115=118 to get this
4x-2x+118
Then we combine like 4x-2x=2x to get this
2x+118
So your final answer is 2x+188 because we cant go any further to simplify the expression.