Question

What value correctly fills in the blank so that the expressions are equivalent?

32 + 72 = _x(4 + 9)

Answer 1

Explanation:

32 + 72 = 8*4 + 8* 9

= 8* (4 + 9)

So 8 will come in the blank

Answer 2

8

Explanation:

Notice:

32 = (8 x 4)

72 = (8 x 9)

Hence,

32 + 72

= (8 x 4) + (8 x 9) (factorize out the 8)

= 8 x (4 + 9)

therefore the musing number is 8