The number is 21.
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n + 20 - 17 + 13 - n = 20 - 17 + 13 = 3 + 13 = 16
x+10=20 then you subtract 10 from both sides x=10
Let the number is x So, X+20=69 X=69-20 X=49 THE NUMBER IS 49 SO, 49 plus 20 equal to 69 .•.
21+9=20
I guess you mean: What number when you subtract 20, gives 40 as the answer?x - 20 = 40.Add 20 to both sides: x - 20 + 20 = 40 + 20x = 60