(G-3)0.4=30

Solution for (G-3)0.4=30 equation:

Simplifying
(G + -3) * 0.4 = 30

Reorder the terms:
(-3 + G) * 0.4 = 30

Reorder the terms for easier multiplication:
0.4(-3 + G) = 30
(-3 * 0.4 + G * 0.4) = 30
(-1.2 + 0.4G) = 30

Solving
-1.2 + 0.4G = 30

Solving for variable 'G'.

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

Add '1.2' to each side of the equation.
-1.2 + 1.2 + 0.4G = 30 + 1.2

Combine like terms: -1.2 + 1.2 = 0.0
0.0 + 0.4G = 30 + 1.2
0.4G = 30 + 1.2

Combine like terms: 30 + 1.2 = 31.2
0.4G = 31.2

Divide each side by '0.4'.
G = 78

Simplifying
G = 78