Hey there we cannot see the question :D Sorry about that I would answer but I cannot!
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Answer:
corresponding value of equal matrix is equal
a=10
b= -6
c=3
Step-by-step explanation:
 
        
             
        
        
        
One company charges:
$376 + $12*h
Other company charges:
$280 + $15*h
They will both charge the same when:
$376 + $12*h = $280 + $15*h
96 = 3*h
hours = 32
Cost will be $760
Double Check
$376 + $12 * 32 hours = $760
$280 + $15 * 32 hours = $760
        
             
        
        
        
Let, number of solid color gift sold is x and printed gift wrap is y.
Also, number of printed paper sold , 325.
Expressing, it in mathematical equation :
y = 325    ....... 1)
Also, The band needs to earn $2,500 for an upcoming competition. 
So , 
3.5x + 5y = 2500    ....... 2)
Solving equation 1 and 2 :
3.5x + 5(325) = 2500
3.5x = 2500 - 1625
3.5x = 875
x = 250
Therefore, number of solid paper they must sell is 250.
Hence, this is the required solution.