5X*7+3X*8=5X*7+9

5X*7+3X*8=5X*7+9

The original equation can be reduced to 35x + 24x = 35x + 9
We get 35x-35x + 24x = 9
We get 24x = 9
The solution is x = 9 / 24 = 3 / 8