83=21+r

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Solution for 83=21+r equation:


Simplifying
83 = 21 + r

Solving
83 = 21 + 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.
83 + -1r = 21 + r + -1r

Combine like terms: r + -1r = 0
83 + -1r = 21 + 0
83 + -1r = 21

Add '-83' to each side of the equation.
83 + -83 + -1r = 21 + -83

Combine like terms: 83 + -83 = 0
0 + -1r = 21 + -83
-1r = 21 + -83

Combine like terms: 21 + -83 = -62
-1r = -62

Divide each side by '-1'.
r = 62

Simplifying
r = 62

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