0.4=r-0.9

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Solution for 0.4=r-0.9 equation:


Simplifying
0.4 = r + -0.9

Reorder the terms:
0.4 = -0.9 + r

Solving
0.4 = -0.9 + r

Solving for variable 'r'.

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

Add '-1r' to each side of the equation.
0.4 + -1r = -0.9 + r + -1r

Combine like terms: r + -1r = 0
0.4 + -1r = -0.9 + 0
0.4 + -1r = -0.9

Add '-0.4' to each side of the equation.
0.4 + -0.4 + -1r = -0.9 + -0.4

Combine like terms: 0.4 + -0.4 = 0.0
0.0 + -1r = -0.9 + -0.4
-1r = -0.9 + -0.4

Combine like terms: -0.9 + -0.4 = -1.3
-1r = -1.3

Divide each side by '-1'.
r = 1.3

Simplifying
r = 1.3

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