Using substitution, which number from the set {15, 25,35, 55} makes the equation y + 15 = 49 true?
To find the number from the given set that makes the equation true, we can substitute each number one by one into the equation and check if it satisfies the equation.
Let's substitute the first number, 15, into the equation:
y + 15 = 49
15 + 15 = 49
30 = 49
Since 30 is not equal to 49, 15 is not the number that makes the equation true.
Let's substitute the second number, 25, into the equation:
y + 15 = 49
25 + 15 = 49
40 = 49
Since 40 is not equal to 49, 25 is not the number that makes the equation true.
Let's substitute the third number, 35, into the equation:
y + 15 = 49
35 + 15 = 49
50 = 49
Since 50 is not equal to 49, 35 is not the number that makes the equation true.
Finally, let's substitute the fourth number, 55, into the equation:
y + 15 = 49
55 + 15 = 49
70 = 49
Since 70 is not equal to 49, 55 is not the number that makes the equation true.
Therefore, none of the numbers from the set {15, 25, 35, 55} make the equation y + 15 = 49 true.