1.

Why should we subtract 5 and not some other number ? why don’t we add 5 on both sides? Discuss.

Answer»

Given x + 5 = 12 

(i) Our aim is to find the value of x. Which means we have to eliminate the other values from LHS. 

Since 5 is given with x it should be subtracted. 

(ii) If we add 5 on both sides we cannot eliminate the numbers from LHS and we get x + 10.



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