Using substitution, we can replace y in the equation y + 15 = 40 with each number from the given set and see which one makes the equation true.
1. For y = 15: 15 + 15 = 30, not equal to 40.
2. For y = 25: 25 + 15 = 40, which is true.
3. For y = 35: 35 + 15 = 50, not equal to 40.
4. For y = 55: 55 + 15 = 70, not equal to 40.
Out of the four numbers in the set {15, 25, 35, 55}, only 25 makes the equation y + 15 = 40 true.
Using substitution, which number from the set {15,25,35,55} makes the equation y+15=40 true
25
35
15
55
1 answer
1 answer