a+28+9a+14=31a

Solution for a+28+9a+14=31a equation:

Simplifying
a + 28 + 9a + 14 = 31a

Reorder the terms:
28 + 14 + a + 9a = 31a

Combine like terms: 28 + 14 = 42
42 + a + 9a = 31a

Combine like terms: a + 9a = 10a
42 + 10a = 31a

Solving
42 + 10a = 31a

Solving for variable 'a'.

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

Add '-31a' to each side of the equation.
42 + 10a + -31a = 31a + -31a

Combine like terms: 10a + -31a = -21a
42 + -21a = 31a + -31a

Combine like terms: 31a + -31a = 0
42 + -21a = 0

Add '-42' to each side of the equation.
42 + -42 + -21a = 0 + -42

Combine like terms: 42 + -42 = 0
0 + -21a = 0 + -42
-21a = 0 + -42

Combine like terms: 0 + -42 = -42
-21a = -42

Divide each side by '-21'.
a = 2

Simplifying
a = 2