34+3a=42-a

Solution for 34+3a=42-a equation:

Simplifying
34 + 3a = 42 + -1a

Solving
34 + 3a = 42 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
34 + 3a + a = 42 + -1a + a

Combine like terms: 3a + a = 4a
34 + 4a = 42 + -1a + a

Combine like terms: -1a + a = 0
34 + 4a = 42 + 0
34 + 4a = 42

Add '-34' to each side of the equation.
34 + -34 + 4a = 42 + -34

Combine like terms: 34 + -34 = 0
0 + 4a = 42 + -34
4a = 42 + -34

Combine like terms: 42 + -34 = 8
4a = 8

Divide each side by '4'.
a = 2

Simplifying
a = 2