The alue of 5 is the tenths place.
I'm assuming you want us to solve for the unknown variable z

Combine like terms on the right side

Use the distributive property on the left side

Add both sides by 20 to cancel out the "-20" on the left side

Divide both sides by 10

That is the value of the known variable, z, in this equation. Let me know if you need any clarifications, thanks!
~ Padoru
Answer:

Step-by-step explanation:

Keep the variables in the left side & rest in the left side:




<span>area of a square = a^2 = 5^2 = 25
answer
</span><span>area of a square = 25 cm^2</span>