Answer:
15x = 375
Explanation:
50x = 35x + 375
50x - 35x = 375 (we place 35x in the left side of the equation, because the left side is for x's, and the right one is for basic numbers. Since it is a positive number in the right side, in the left side it becomes an opposite number, so it will -35x)
15x = 375 / : 15 (we subtract 35x from 50x)
x = 25