30=19-r

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Solution for 30=19-r equation:


Simplifying
30 = 19 + -1r

Solving
30 = 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.
30 + r = 19 + -1r + r

Combine like terms: -1r + r = 0
30 + r = 19 + 0
30 + r = 19

Add '-30' to each side of the equation.
30 + -30 + r = 19 + -30

Combine like terms: 30 + -30 = 0
0 + r = 19 + -30
r = 19 + -30

Combine like terms: 19 + -30 = -11
r = -11

Simplifying
r = -11

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