Joy added 26 new contacts to her phone list. She now has a total of 100 contacts. Let c represent how many contacts joy had on her phone before she updated it

c=74

Step-by-step explanation:

Let c represent how many contacts Joy had on her phone before she updated it.

Because Joy added 26 new contacts, we can say that c+26 is equal to her new total of 100 contacts.

c+26=100

Therefore, the equation that represents this situation is c+26=100

Now, we can use our equation to solve for c.

c+26=100

Subtract both sides by 26 to isolate c

c+26-26=100-26

c=74

Therefore, Joy had 74 contacts on her phone before she updated it.

I hope this helps!

step-by-step explanation:

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hope this

b. astronomers