High School

Choose the correct equation representing Mike's cell phone savings:

A. \(315 = 115 + 10w\)
B. \(315 = 115 - 10w\)
C. \(315 = 115 \times 10w\)
D. \(315 = \frac{115}{10w}\)

Answer :

Final answer:

To solve the equation 315 = 115 + 10w, subtract 115 from both sides and then divide both sides by 10 to isolate the variable w. The solution is w = 20.

Explanation:

The equation is represented as 315 = 115 + 10w. To solve this equation, we need to isolate the variable w.

First, subtract 115 from both sides of the equation:

315 - 115 = 115 + 10w - 115

This simplifies to:

200 = 10w

Next, divide both sides of the equation by 10:

200/10 = 10w/10

This simplifies to:

20 = w

Therefore, the value of w is 20.

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