(5x-4)+(8x+9)= simply

x=-5/13

taking note of the assumption made.

Step-by-step explanation:

(5x-4)+(8x+9)=0

to solve for X, assuming you meant '0' and not '=simply'

we have

5x-4+8x+9=0

group like terms and solve.

5x+8x-4+9=0

13x+5=0

subtracting -5 from both sides of the equation

13x+5-5=0-5;

13x=-5

x=-5/13

h * s * a

h = history teacher

s = science teacher

a =   art teacher.

i see no data table, but just multiply the number of history teachers, science teachers, and art teachers.