Question

if 288 be added to certain a number,the result will b equal to three time the excess of thr number over 12 :finf the number

Answer 1

Let the number be x. x+288 = 3(x-12), or x+288 = 3x-36, or 2x = 288+36 = 324 ... will the result be equal to 3 times the excess of the number over 12 find ...

Answer 2

Let the number be x.

x+288 = 3(x-12), or

x+288 = 3x-36, or

2x = 288+36 = 324, or

x = 162.

Check: 162+288 = 450

3(162–12) = 3*150 = 450. Correct.

The number is 162.
Hope it helps.
Thanks.