Can somebody plz explain to me how you do this

21/2

Step-by-step explanation:

(x-8)/5=2/4

step 1 you simplify if you can to make it easier

(x-8)/5=1/2

step 2 multiply each side by 5

x-8=5/2

step 3 add each side by 8

x=5/2+8

16/2+5/2=21/2

x=21/2

i think it's ф or x=6,-6

step-by-step explanation:

-x^2=-36

x^2=-36

ф

or

if you mean by : -(x^2)=-36

it'll be: x^2=36

x=6,x=-6

hope it'll ! have a good day!

you for asking!