How to solve 100=8(x+9)

  x= 3.5

Step-by-step explanation:

8(x+9) = 100

8x + 72 =72

100- 72= 28

28/8x= 3.5

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!