-R-0.4=-3

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Solution for -R-0.4=-3 equation: 


Simplifying
-1R + -0.4 = -3

Reorder the terms:
-0.4 + -1R = -3

Solving
-0.4 + -1R = -3

Solving for variable 'R'.

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

Add '0.4' to each side of the equation.
-0.4 + 0.4 + -1R = -3 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + -1R = -3 + 0.4
-1R = -3 + 0.4

Combine like terms: -3 + 0.4 = -2.6
-1R = -2.6

Divide each side by '-1'.
R = 2.6

Simplifying
R = 2.6

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