3.1a-0.04=7.2

Solution for 3.1a-0.04=7.2 equation:

Simplifying
3.1a + -0.04 = 7.2

Reorder the terms:
-0.04 + 3.1a = 7.2

Solving
-0.04 + 3.1a = 7.2

Solving for variable 'a'.

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

Add '0.04' to each side of the equation.
-0.04 + 0.04 + 3.1a = 7.2 + 0.04

Combine like terms: -0.04 + 0.04 = 0.00
0.00 + 3.1a = 7.2 + 0.04
3.1a = 7.2 + 0.04

Combine like terms: 7.2 + 0.04 = 7.24
3.1a = 7.24

Divide each side by '3.1'.
a = 2.335483871

Simplifying
a = 2.335483871