Patrick F. answered • 09/15/15
Tutor
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Tutoring in Physics, chemistry, any level of math
If you write out the sentence as an equation...
"a number" --> x
"decreased by 19" --> - 19
"is 83" --> = 83
So it's x - 19 = 83. To solve for x, add 19 to both sides to get x = 102.
