138=r+38

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Solution for 138=r+38 equation: 


Simplifying
138 = r + 38

Reorder the terms:
138 = 38 + r

Solving
138 = 38 + 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.
138 + -1r = 38 + r + -1r

Combine like terms: r + -1r = 0
138 + -1r = 38 + 0
138 + -1r = 38

Add '-138' to each side of the equation.
138 + -138 + -1r = 38 + -138

Combine like terms: 138 + -138 = 0
0 + -1r = 38 + -138
-1r = 38 + -138

Combine like terms: 38 + -138 = -100
-1r = -100

Divide each side by '-1'.
r = 100

Simplifying
r = 100

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