4.3a-3.3a-1.6=1.2-7.8

Solution for 4.3a-3.3a-1.6=1.2-7.8 equation:

Simplifying
4.3a + -3.3a + -1.6 = 1.2 + -7.8

Reorder the terms:
-1.6 + 4.3a + -3.3a = 1.2 + -7.8

Combine like terms: 4.3a + -3.3a = 1a
-1.6 + 1a = 1.2 + -7.8

Combine like terms: 1.2 + -7.8 = -6.6
-1.6 + 1a = -6.6

Solving
-1.6 + 1a = -6.6

Solving for variable 'a'.

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

Add '1.6' to each side of the equation.
-1.6 + 1.6 + 1a = -6.6 + 1.6

Combine like terms: -1.6 + 1.6 = 0.0
0.0 + 1a = -6.6 + 1.6
1a = -6.6 + 1.6

Combine like terms: -6.6 + 1.6 = -5
1a = -5

Divide each side by '1'.
a = -5

Simplifying
a = -5