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Colin was thinking of a number. Colin doubles it, then adds 9 to get an answer of 95.4. What
was the original number?

Respuesta :

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Answer:

43.2

Step-by-step explanation:

Set up an equation to model the situation;

2x + 9 = 95.4

"x" represents the unknown number. 2x is present because the number is double. 9 is added because the problem says that Colin added 9. This is set equal to 95.4, because the result attained is 95.4.

Solve the equation using inverse operations;

2x + 9 = 95.4

    -9       -9

2x = 86.4

/2     /2

x = 43.2

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