Question

-15p + __ = 0
15p + __ = 0
7p + __ = 0
-7p + __ = 0

-15p
7p
15p
-7p

Explanation:

Step1: Isolate the unknown term

For $-15p + x = 0$, rearrange to solve for $x$:
$x = 15p$

Step2: Isolate the unknown term

For $15p + x = 0$, rearrange to solve for $x$:
$x = -15p$

Step3: Isolate the unknown term

For $7p + x = 0$, rearrange to solve for $x$:
$x = -7p$

Step4: Isolate the unknown term

For $-7p + x = 0$, rearrange to solve for $x$:
$x = 7p$

Answer:

$-15p + \boldsymbol{15p} = 0$
$15p + \boldsymbol{-15p} = 0$
$7p + \boldsymbol{-7p} = 0$
$-7p + \boldsymbol{7p} = 0$