Answer:
Negative Quarter.
Explanation:
Simply send the letters to one side (preferrably the left) and numbers on the other side... Remember to swutch signs when you pelting the number or letter across the equal sign. i.e negative will become positive and vice versa. lets go...
7 - 5x - 5 - 7x = 5
-5x - 7x = 5 + 5 - 7
-12x = 3
x = -3/12
x = -1/4