6.4=r*4

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Solution for 6.4=r*4 equation:


Simplifying
6.4 = r * 4

Reorder the terms for easier multiplication:
6.4 = 4r

Solving
6.4 = 4r

Solving for variable 'r'.

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

Add '-4r' to each side of the equation.
6.4 + -4r = 4r + -4r

Combine like terms: 4r + -4r = 0
6.4 + -4r = 0

Add '-6.4' to each side of the equation.
6.4 + -6.4 + -4r = 0 + -6.4

Combine like terms: 6.4 + -6.4 = 0.0
0.0 + -4r = 0 + -6.4
-4r = 0 + -6.4

Combine like terms: 0 + -6.4 = -6.4
-4r = -6.4

Divide each side by '-4'.
r = 1.6

Simplifying
r = 1.6

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