Let the number is = x
So number increased by 3 is = x+3.
So product of 7 and (x+3) is = 7*(x+3).
Twice of number is = 2x
So we can write
7(x+3) = 39 - 2x
7x + 21 = 39 - 2x
Now we can arrange the term as
7x + 2x = 39 - 21
9x = 18
x = 2.
SO the number is 2.
