Using the equation y = 2x + 5, what would the input need to be for an output of -45?

Answer 1

The output of the equation is y, and the input is x.

The question is saying make y = -45 and find the resulting value of x.

y = 2x +5

-45 = 2x +5

-45 - 5 =2x + 5 - 5

-50 = 2x

-50/2 = 2x/2

-25 = x

The answer is -25.