Question

If 3 is added to a number and the sum is multiplied by 3 the result is 7 times the number decreased by 9 find the numbers

Answer 1

Answer:   $\frac{9}{2}$

Step-by-step explanation:

3(3 + x) = 7x - 9

 9 + 3x = 7x - 9     distributed 3 on the left side

      -3x   -3x    

 9       =  4x - 9

+9                +9

18       =  4x

÷4          ÷4      

  $\frac{9}{2}$      =   x