What is the solution to $16=a-4.2$ ?

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Answer 1 · 2016-12-26T23:58:10

$a = 20.2$

To solve this problem we need to add $color(red)(4.2)$ to each side of the equation to determine $a$ and keep the equation balanced:

$16 + color(red)(4.2) = a - 4.2 + color(red)(4.2)$

$20.2 = a - 0$

$20.2 = a$

or

$a = 20.2$

What is the solution to 16=a-4.216=a-4.2?