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Question

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What should be subtracted from -23 to get 34?
(a) -1112
(b) -1312
(c) -54
(d) -1712

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Solution

(d) -1712

Let the number be x.
Now,

-23-x=34-1×23+x=3423+x=-34x=-34+Additive inverse of 23 x=-34+-23 x=-34+-23 x=-3×34×3+-2×43×4 x-912+-812 x=-1712

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