19.5=4r+2.8

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Solution for 19.5=4r+2.8 equation: 


Simplifying
19.5 = 4r + 2.8

Reorder the terms:
19.5 = 2.8 + 4r

Solving
19.5 = 2.8 + 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.
19.5 + -4r = 2.8 + 4r + -4r

Combine like terms: 4r + -4r = 0
19.5 + -4r = 2.8 + 0
19.5 + -4r = 2.8

Add '-19.5' to each side of the equation.
19.5 + -19.5 + -4r = 2.8 + -19.5

Combine like terms: 19.5 + -19.5 = 0.0
0.0 + -4r = 2.8 + -19.5
-4r = 2.8 + -19.5

Combine like terms: 2.8 + -19.5 = -16.7
-4r = -16.7

Divide each side by '-4'.
r = 4.175

Simplifying
r = 4.175

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