-15.6=-3.9R

Solution for -15.6=-3.9R equation:

Simplifying
-15.6 = -3.9R

Solving
-15.6 = -3.9R

Solving for variable 'R'.

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

Add '3.9R' to each side of the equation.
-15.6 + 3.9R = -3.9R + 3.9R

Combine like terms: -3.9R + 3.9R = 0.0
-15.6 + 3.9R = 0.0

Add '15.6' to each side of the equation.
-15.6 + 15.6 + 3.9R = 0.0 + 15.6

Combine like terms: -15.6 + 15.6 = 0.0
0.0 + 3.9R = 0.0 + 15.6
3.9R = 0.0 + 15.6

Combine like terms: 0.0 + 15.6 = 15.6
3.9R = 15.6

Divide each side by '3.9'.
R = 4

Simplifying
R = 4