Question

which equation has $h=5$ as the solution?
$\boldsymbol{\textcircled{a}}$ $51 - h = 46$
$\boldsymbol{\textcircled{b}}$ $44 + h = 51$
$\boldsymbol{\textcircled{c}}$ $h - 4 = 5$
$\boldsymbol{\textcircled{d}}$ $7h = 42$

Explanation:

Step1: Test Option A

Substitute $h=5$ into $51 - h = 46$:
$51 - 5 = 46$
$46 = 46$, this is true, but check all options.

Step2: Test Option B

Substitute $h=5$ into $44 + h = 51$:
$44 + 5 = 49$
$49
eq 51$, this is false.

Step3: Test Option C

Substitute $h=5$ into $h - 4 = 5$:
$5 - 4 = 1$
$1
eq 5$, this is false.

Step4: Test Option D

Substitute $h=5$ into $7h = 42$:
$7 \times 5 = 35$
$35
eq 42$, this is false.

Answer:

A. $51 - h = 46$