Question

Chris inputs the same number into both of these function machines. The output he is given is the same for both machines. What number has he input? -9 x 3 Input Input X-3 +15 Output ​

Answer 1

Answer: 7

Step-by-step explanation:

Assume that the number entered is x.

(The lowercase x is a variable and the uppercase X is the multiplication symbol.)

(x-9)X3=xX(-3)+15

3x-27=-3x+15

6x=42

x=7

The answer is 7.