100=r-30

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Solution for 100=r-30 equation:


Simplifying
100 = r + -30

Reorder the terms:
100 = -30 + r

Solving
100 = -30 + r

Solving for variable 'r'.

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

Add '-1r' to each side of the equation.
100 + -1r = -30 + r + -1r

Combine like terms: r + -1r = 0
100 + -1r = -30 + 0
100 + -1r = -30

Add '-100' to each side of the equation.
100 + -100 + -1r = -30 + -100

Combine like terms: 100 + -100 = 0
0 + -1r = -30 + -100
-1r = -30 + -100

Combine like terms: -30 + -100 = -130
-1r = -130

Divide each side by '-1'.
r = 130

Simplifying
r = 130

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