Question

Using substitution, which number from the set {15, 25, 35, 55}
makes the equation y+15=40
true?(1 point)
Responses

25
25

55
55

15
15

35

Answer 1

To solve the equation \( y + 15 = 40 \) using substitution, we can isolate \( y \) by subtracting 15 from both sides:

\[
y = 40 - 15
\]

Calculating that gives us:

\[
y = 25
\]

Now we check if 25 is in the given set {15, 25, 35, 55}. Since 25 is indeed in the set, the number from the set that makes the equation true is:

**25**