Answer:
-25
Step-by-step explanation:
Essentially, y is your output and x is your input.
Here's your base equation: y = 2x + 5
Knowing the information above, let's plug it in:
-45 = 2x + 5
(Subtract 5 from both sides)
-50 = 2x
(Divide both sides by 2 to isolate x)
-25 = x
And there you go.
input is -25
y = 2x + 5
The output is -45 which is y
Subtract 5 from each side
-45-5 = 2x
Divide each side by 2
-50/2 = 2x/2
d + 18
Answer: x = 87.5
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