|-9| means the absolute value of -9 which is 9
so we have 9 - 9 = 0 (answer)
5y-30=-5y+30
add 30 to both sides
5y = -5y+60
add 5y to both sides
10y = 60
divide both sides by 10
y = 6
<em>hope this helps!</em>
I think a. But I don’t understand this question.
