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

To simplify the algebraic expression x + (x+10) + 2(x+10), first distribute any multiplication and then combine like terms.

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

Start by distributing the 2 over the terms in the parentheses:

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

Now combine like terms:

x + x + 2x + 10 + 20

Combine the x terms:

1x + 1x + 2x = 4x

And add the constants:

10 + 20 = 30

So the simplified expression is:

4x + 30

This is your final answer.