One person changed the order of the multiplicator digits

Algebra Level 1

In a multiplication of two factors, being $x \times 43$ . One person changed the order of the numbers of 43, putting in its place 34. After the inversion, the product was 99 units lower than the primitive product. What is the value of $x$ ?

The answer is 11.

1 solution

Luiz Claudio
Dec 5, 2018

$x \times 43 = p$

$x \times 34 = p-99$

$x \times 34 = x \times 43-99$

$43 \times x-34\times x = 99$

$9 \times x = 99$

$x = 11$

I think you made a typo in the last line where you wrote a.

Henry U - 2 years, 6 months ago

One person changed the order of the multiplicator digits

The answer is 11.

1 solution

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