1(1a+2a)+1=10

Solution for 1(1a+2a)+1=10 equation:

Simplifying
1(1a + 2a) + 1 = 10

Combine like terms: 1a + 2a = 3a
1(3a) + 1 = 10

Remove parenthesis around (3a)
1 * 3a + 1 = 10

Multiply 1 * 3
3a + 1 = 10

Reorder the terms:
1 + 3a = 10

Solving
1 + 3a = 10

Solving for variable 'a'.

Move all terms containing a to the left, all other terms to the right.

Add '-1' to each side of the equation.
1 + -1 + 3a = 10 + -1

Combine like terms: 1 + -1 = 0
0 + 3a = 10 + -1
3a = 10 + -1

Combine like terms: 10 + -1 = 9
3a = 9

Divide each side by '3'.
a = 3

Simplifying
a = 3