Question

What is the x value... such that y =15 - 3x and y = 0?

Answer 1

y = 15 - 3x

Substitute the value of y = 0 to the equation

0 = 15 - 3x     |add 3x to both sides

3x = 15     |divide both sides by 3

x = 5

Answer: For y = 0, x = 5.