Question

at gabbys family reunion, gabby hands out watermelon for the annual seed - spitting contest. she gives a watermelon slice to each kid at the reunion. she also gives a slice to 40 adults. gabby hands out 90 watermelon slices in all. which equation can you use to find how many kids k are at the reunion?
$k - 40 = 90$
$40k = 90$
$k + 40 = 90$
$\frac{k}{40} = 90$
solve this equation for k to find how many kids are at the reunion.
____ kids
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Explanation:

Step1: Determine the correct equation

Gabby gives a slice to each kid (so \( k \) slices to kids) and 40 slices to adults. Total slices are 90. So the equation is \( k + 40 = 90 \).

Step2: Solve the equation for \( k \)

Subtract 40 from both sides of \( k + 40 = 90 \):
\( k + 40 - 40 = 90 - 40 \)
\( k = 50 \)

Answer:

The correct equation is \( k + 40 = 90 \), and the number of kids is 50.