r-9=19-r

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Solution for r-9=19-r equation:


Simplifying
r + -9 = 19 + -1r

Reorder the terms:
-9 + r = 19 + -1r

Solving
-9 + r = 19 + -1r

Solving for variable 'r'.

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

Add 'r' to each side of the equation.
-9 + r + r = 19 + -1r + r

Combine like terms: r + r = 2r
-9 + 2r = 19 + -1r + r

Combine like terms: -1r + r = 0
-9 + 2r = 19 + 0
-9 + 2r = 19

Add '9' to each side of the equation.
-9 + 9 + 2r = 19 + 9

Combine like terms: -9 + 9 = 0
0 + 2r = 19 + 9
2r = 19 + 9

Combine like terms: 19 + 9 = 28
2r = 28

Divide each side by '2'.
r = 14

Simplifying
r = 14

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