Answer:
j=300
Explanation:
first you move the negative sign to the left so you will get
-60 = -
after multiply both sides 5 so you will get
-60 *5 =-j
after simplify to -60 * 5 to 300 so you will get
-300 = -j
then multiply both sides by -1
then switch the sides and that's how you get your answer .