Answer:
Step-by-step explanation:
We have that the Star television costs $750 more than the Jupiter television.
If c represents the cost of the Jupiter television, then the star television is [tex]s=c+750[/tex]
This implies that:
[tex]s-c=750[/tex]---->eqn1
The two models cost $2,600 all together. This means that:
[tex]s+c=2600[/tex]---->eqn2
Subtracting eqn1 from eqn2 gives:
[tex]2c=1850\\\implies c=925[/tex]
When Sandra substitutes c=925 into the equation she gets c+(c-750)=2600
This is not a true statement, because she must rather get:
Then the cost of the Jupiter television becomes
925 +750=1675