(s÷t) - r is the correct expression.
Answer:
Step-by-step explanation:
(D+R) = 80:2 = 40
D = 40-R
(D+8) * R = 72X
Thay D=40-R
(40-R+8)*R = 72X
R=1.55, D=38.45
I found these
1,-1,3
-1,1,3
1,1,-3
let me know if it is correct
To isolate the variable means to have it by itself on one side of the equation, where the variable equals an expression.
To isolate
, we will need to remove the variables and other terms "connected" to the
variable:



By dividing terms "connected" to our
variable, we have isolated it one side of the equation.