Using substitution, which number from the set {15, 25, 35, 55} makes the equation y+15=40 true?(1 point)
Responses
35
35
25
25
55
55
15
To find the number that makes the equation true, we need to substitute each number from the set into the equation and see which one satisfies the equation.
1. Substitute 15: y + 15 = 40
Subtract 15 from both sides: y = 40 - 15 = 25
The equation is not true for y = 15.
2. Substitute 25: y + 15 = 40
Subtract 15 from both sides: y = 40 - 15 = 25
The equation is true for y = 25.
3. Substitute 35: y + 15 = 40
Subtract 15 from both sides: y = 40 - 15 = 25
The equation is not true for y = 35.
4. Substitute 55: y + 15 = 40
Subtract 15 from both sides: y = 40 - 15 = 25
The equation is not true for y = 55.
The number that makes the equation true is 25.