Question 290611
When the sum of 8 and a certain number is increased by 12,
 the result is the same as the product of 3 and the number.
(x + 8) + 12 = 3x
x + 20 = 3x
20 = 3x - x
20 = 2x
x = {{{20/2}}}
x = 10
:
:
Check:
10 + 8 + 12 = 3(10)