Answer :
We start with the equation
[tex]$$
z - 215 = 3.
$$[/tex]
To isolate [tex]$z$[/tex], we need to eliminate the [tex]$-215$[/tex] on the left-hand side. We do this by adding [tex]$215$[/tex] to both sides of the equation. This gives:
[tex]$$
z - 215 + 215 = 3 + 215.
$$[/tex]
On the left-hand side, [tex]$-215 + 215 = 0$[/tex], so we have:
[tex]$$
z = 3 + 215.
$$[/tex]
Since [tex]$3 + 215 = 218$[/tex], we find that:
[tex]$$
z = 218.
$$[/tex]
Thus, the equation is solved by adding [tex]$215$[/tex] to both sides. Therefore, the correct answer is option b.
[tex]$$
z - 215 = 3.
$$[/tex]
To isolate [tex]$z$[/tex], we need to eliminate the [tex]$-215$[/tex] on the left-hand side. We do this by adding [tex]$215$[/tex] to both sides of the equation. This gives:
[tex]$$
z - 215 + 215 = 3 + 215.
$$[/tex]
On the left-hand side, [tex]$-215 + 215 = 0$[/tex], so we have:
[tex]$$
z = 3 + 215.
$$[/tex]
Since [tex]$3 + 215 = 218$[/tex], we find that:
[tex]$$
z = 218.
$$[/tex]
Thus, the equation is solved by adding [tex]$215$[/tex] to both sides. Therefore, the correct answer is option b.