To find out which number from the set {15, 25, 35, 55} makes the equation y + 15 = 40 true, we can substitute each number into the equation and see which one satisfies it.
Let's start with the first number, 15:
15 + 15 = 30 ≠ 40
Next, let's try the second number, 25:
25 + 15 = 40
Therefore, the number that makes the equation y + 15 = 40 true is 25.
So, the answer is A) 25.
using substitution, which number from the set { 15, 25 , 35, 55 } makes the equation y + 15 = 40 true? A 25. B 15. C 55. D 35.
1 answer