How do you solve $r-5=10$ ?

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Answer 1 · 2018-03-10T11:53:56

See a solution process below:

Add $color(red)(5)$ to each side of the equation to solve for $r$ while keeping the equation balanced:

$r - 5 + color(red)(5) = 10 + color(red)(5)$

$r - 0 = 15$

$r = 15$

How do you solve r-5=10r-5=10?