Hey you can use Mathaway it's really it will solve anything you want
Answer:
x = ± 
Step-by-step explanation:
3x² + 7 = 28 ( subtract 7 from both sides )
3x² = 21 ( divide both sides by 3 )
x² = 7 ( take square root of both sides )
x = ± 
that is x = -
, x = 
Do you have a (a,b,c,d) type of answer?
if yes it would be c, if no... Then uh good luck
Its 78/10 = 39/5
Hope it helps :)
The answer would be $280.00 and that’s just simple as that :)