Final answer:
To write a number sentence for the equation 3y - 15 = 40, rearrange the equation to isolate the variable y on one side. The number sentence is y = 55/3.
Step-by-step explanation:
A number sentence is a mathematical statement that includes numbers and mathematical operations.
To write a number sentence for the equation 3y - 15 = 40, we need to rearrange the equation to isolate the variable y on one side.
First, add 15 to both sides of the equation:
3y - 15 + 15 = 40 + 15
3y = 55
Then, divide both sides by 3 to solve for y:
y = 55/3
The number sentence for the given equation is y = 55/3.