A pen is $2. Using substitution, this is how you solve the system of equations
Let a represent the cost of a photo album and let p represent the cost of a pen.
B. -2 although it would come out to be -6<-6
Answer:
If a × b = 0 then a = 0 or b = 0
(or both a=0 and b=0)
The "Zero Product Property" says:
If (x−5)(x−3) = 0 then (x−5) = 0 or (x−3) = 0
Now we just solve each of those:
For (x−5) = 0 we get x = 5
For (x−3) = 0 we get x = 3
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30 + 40 - 60
70 - 60
10
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