Etta W. answered 06/16/20
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Let x equal last year's salary.
let .06x equal the raise.
the equation would be x + .06x = 33,390.
combine the like terms to get 1.06x.
1.06x = 33,390
divide both sides of the equation by 1.06.
x = 31,500
Last year's salary was $31,500.
to confirm the answer: find 6% of $31,500 and add to $31,500.
$1890 plus $31,500 equals $33,390.