Question

If 8 is subtracted from seven times a certain number, the result is the same as if 28 is added to three times the number. Find the number.

Answer 1

-2

Explanation:

Sol`n:

A/C to the question,

A certain number be x,

Then,

8-7x=28+3

or,8-28=3x+7x

or,-20=10x

or,-20/10=10x

or,-2=x

or, x=-2

Therefore , The number is -2.