The product of negative five-ninths and the sum of a number and three-point-one is thirteen-point-seven.

-5/9 · x + 3.1 = 13.7

Step-by-step explanation:

product = multiplication

five-ninths = 5/9

sum = answer to an addition problem

three-point-one = 3.1

thirteen-point-seven = 13.7

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!