Question

-27p + __ = 0
27p + __ = 0
-13p + __ = 0
13p + __ = 0
27p
13p
-13p
-27p

Explanation:

Step1: Solve for first blank

Let the blank be $x$. For $-27p + x = 0$, rearrange to isolate $x$.
$x = 27p$

Step2: Solve for second blank

Let the blank be $y$. For $27p + y = 0$, rearrange to isolate $y$.
$y = -27p$

Step3: Solve for third blank

Let the blank be $z$. For $-13p + z = 0$, rearrange to isolate $z$.
$z = 13p$

Step4: Solve for fourth blank

Let the blank be $w$. For $13p + w = 0$, rearrange to isolate $w$.
$w = -13p$

Answer:

$-27p + \boldsymbol{27p} = 0$
$27p + \boldsymbol{-27p} = 0$
$-13p + \boldsymbol{13p} = 0$
$13p + \boldsymbol{-13p} = 0$