Question

If 21× (−36) + A × 46 = 21(−36 + 46),then the value of A is

Answer 1

This equation is the example of distributive property over addition.

A x B + A x C = A ( B + C)

According to the above given example --

21 x (-36) + A x 46 = 21( -36 +46)

Here 21 = A

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Answer 2

Hey
Here's your answer !!

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expanding 21(−36 + 46) , we get ,

21(−36 + 46) = 21 × ( -36 ) + 21 × 46 .

Now , comparing,
21 × ( -36 ) + 21 × 46 and 21× (−36) + A × 46 ,

we get ,

A = 21 . [ Answer ] .

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Hope it helps !!