Question

Solve A = πr + 4t for t.

t = the quantity A minus pi r, divided by four
t = A divided by four, minus pi r
t = A - πr - 4
t = A + πr + 4

Answer 1

Well lets begin to solve for t
\[A= \pi r+4t\]
Our goal is to isolate t
So our first step would be to move the pi*r to the other side by subtracting it from both sides of the equation
\[A- \color{blue}{\pi r}= \pi r+4t - \color{blue}{\pi r}\]
\[A-\pi r=4t\]
Then our next step is divide both sides by 4
\[\frac{A-\pi r}{\color{blue}{4}}=\frac{4t}{\color{blue}{4}}\]
\[\frac{A-\pi r}{4}=t\]

Hence your answer.