Question

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Part 1
Wanda added 24 new contacts to her phone list. She had to delete 10 old contacts before she could add any more. Wanda now has a total of 100 contacts. Let c represent how many contacts she had on her phone list before she updated it. Write an equation and then solve for c.
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Part 1
Choose the correct equation below.
A.c plus 10 minus 24 equals 100
c plus 10 minus 24 equals 100
B.c plus 24 minus 10 equals 100
c plus 24 minus 10 equals 100
C.c plus 100 minus 24 equals 10
c plus 100 minus 24 equals 10
D.c plus 100 minus 10 equals 24
c plus 100 minus 10 equals 24
Choose the correct equation below.

Answer 1

Wanda started with c contacts, deleted 10, then added 24, giving c − 10 + 24 = 100. That is equivalent to choice B: c + 24 − 10 = 100.

Solve: c + 14 = 100, so c = 86.