Question

Mark the correct alternatives in each of the following:

What must be subtracted from −6 to obtain −14?

(a) 8 (b) 20 (c) −20 (d) −8

Answer 1

Let x be subtracted from −6 to obtain −14.

∴ −6 − x = −14

Putting x = 8, we get

LHS = −6 − 8 = −6 + (−8) = −14 = RHS

Thus, 8 must be subtracted from −6 to obtain −14.

Hence, the correct answer is option (a).