When fifteen is reduced by one-third of a number, the result is 12. find the number

The number is 9.

Solution:

Let the number be x.

In the question it is given that when 15 is reduced from one-third of a number the result is 12. Since we have assumed the number to be x, therefore one - third of a number is given by  1/3x.

Using the below equation we will try to find the value of x.

Grouping the terms,

Therefore,

x=9

Thus, the number is 9.

here is your mark brainliest

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it