0.4r-1.2=0.3+0.6

Solution for 0.4r-1.2=0.3+0.6 equation:

Simplifying
0.4r + -1.2 = 0.3 + 0.6

Reorder the terms:
-1.2 + 0.4r = 0.3 + 0.6

Combine like terms: 0.3 + 0.6 = 0.9
-1.2 + 0.4r = 0.9

Solving
-1.2 + 0.4r = 0.9

Solving for variable 'r'.

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

Add '1.2' to each side of the equation.
-1.2 + 1.2 + 0.4r = 0.9 + 1.2

Combine like terms: -1.2 + 1.2 = 0.0
0.0 + 0.4r = 0.9 + 1.2
0.4r = 0.9 + 1.2

Combine like terms: 0.9 + 1.2 = 2.1
0.4r = 2.1

Divide each side by '0.4'.
r = 5.25

Simplifying
r = 5.25