Question

When a number is multiplied by 2 and 12 is subtracted from it, the result obtained is the same as three times the difference of the number 4. Find the number

Answer 1

Let the number be x.

2x-12=3x-4
-12+4=3x-2x
-8=x
or
x=-8

Check as per the question.
-16-12=-24-4
-28=-28
Hence Proved :)

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Answer 2

Let the number be a
∴ According to question,
⇒2a-12=3a-4
⇒-12+4=a(3-2)
∴-8=a