What makes an equation with a single unknown helpful than the other without single unknown?

What does it mean when an equation has no identity?

Identity equations are equations that are true no matter what value is plugged in for the variable. If you simplify an identity equation, you'll ALWAYS get a true statement. Learn about identity equations in this tutorial, and then create your own identity equation.

What is an Identity Equation? | Virtual Nerd

Step-by-step explanation:

m∠vru = 80°

m∠urw = 15°

step-by-step explanation:

f(x) = - 2/3x + 5; f(5/2)

substitute 5/2 in for x:

f(5/2) = -2/3(5/2) + 5

simplify the right side:

f(5/2) = -5/3 + 5

f(5/2) = 10/3

answer:

f(5/2) = 10/3

i hope this you!