X+(x+10)+2(x+10)

Sure, let's simplify the algebraic expression you've provided:

x + (x + 10) + 2(x + 10)

Start by opening the parentheses:

x + x + 10 + 2 * x + 2 * 10

Now combine like terms:

x + x + 2x + 10 + 20

4x + 30

So, the simplified form of the expression x + (x + 10) + 2(x + 10) is 4x + 30.