19=4r-9

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Solution for 19=4r-9 equation:


Simplifying
19 = 4r + -9

Reorder the terms:
19 = -9 + 4r

Solving
19 = -9 + 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 + -4r = -9 + 4r + -4r

Combine like terms: 4r + -4r = 0
19 + -4r = -9 + 0
19 + -4r = -9

Add '-19' to each side of the equation.
19 + -19 + -4r = -9 + -19

Combine like terms: 19 + -19 = 0
0 + -4r = -9 + -19
-4r = -9 + -19

Combine like terms: -9 + -19 = -28
-4r = -28

Divide each side by '-4'.
r = 7

Simplifying
r = 7

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