0.3a-0.83=0.4

Solution for 0.3a-0.83=0.4 equation:

Simplifying
0.3a + -0.83 = 0.4

Reorder the terms:
-0.83 + 0.3a = 0.4

Solving
-0.83 + 0.3a = 0.4

Solving for variable 'a'.

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

Add '0.83' to each side of the equation.
-0.83 + 0.83 + 0.3a = 0.4 + 0.83

Combine like terms: -0.83 + 0.83 = 0.00
0.00 + 0.3a = 0.4 + 0.83
0.3a = 0.4 + 0.83

Combine like terms: 0.4 + 0.83 = 1.23
0.3a = 1.23

Divide each side by '0.3'.
a = 4.1

Simplifying
a = 4.1