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Question

Mark against the correct answer in each of the following:
What must be subtracted from $$-3$$ to get $$-9?$$

A
-6
B
6
C
12
D
-12
Solution
Verified by Toppr

Correct option is C. 6
Let us assume closure property of subtraction [a-b=c]
Let, $$a = -3,$$ missing integer $$b = x,$$ and $$c = 9$$, then
$$\Rightarrow -3-(x) = -9$$
$$\Rightarrow -3+9 = x$$
$$\Rightarrow x = 6$$

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