SOLUTION: what should be added to 71 to make the sum 101?

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Question 893591: what should be added to 71 to make the sum 101?
Answer by Jynald-(6) About Me  (Show Source):
You can put this solution on YOUR website!
let x be the added number
71 x = 101
isolate x,
tranpose 71 to other side and it become negative
x = 101 - 71
x = 30
checking:
30 71 = 101
101 = 101