Answer :
Javier has already saved \[tex]$55, and the iPod costs \$[/tex]145. If we let [tex]$x$[/tex] represent the additional amount he needs to save, then together the amount he has plus the amount he still needs equals the total cost. That is, we have:
[tex]$$55 + x = 145.$$[/tex]
To solve for [tex]$x$[/tex], subtract 55 from both sides:
[tex]$$x = 145 - 55.$$[/tex]
This shows that Javier must save an additional \[tex]$90. The equation representing this situation is
$[/tex][tex]$55 + x = 145,$[/tex]$
which corresponds to option B.
[tex]$$55 + x = 145.$$[/tex]
To solve for [tex]$x$[/tex], subtract 55 from both sides:
[tex]$$x = 145 - 55.$$[/tex]
This shows that Javier must save an additional \[tex]$90. The equation representing this situation is
$[/tex][tex]$55 + x = 145,$[/tex]$
which corresponds to option B.