3)
-z+7= -8
subtract 7 from each side to then get -z= -15
If you need a positive number for z multiply each side by -1
4)
\(\frac{w}{-9} +7=10\)
subtract 7 from each side to get \(\frac{w}{-9} =10\)
Then multiply each side by -9 to get W= -90
5)
25=8+\(\frac{n}{2}\)
first subtract 8 from each side to get 25=\(\frac{n}{2}\)
Now multiply each side by 2 to get 50=n
6)
\(\frac{y-8}{3} =-7\)
first multiply each side by three to get y-8= -21
add 8 to each side y= -13
Hope I helped :)
