Answer:
-5
Step-by-step explanation:
-5x-12= 13 add 12 to both sides
-5x-12 + 12= 13 + 12 ➡ -5x = 25 divide both sides by 5
-5x ÷ 5 = 25 ÷ 5 ➡ -x = 5 and x = -5
