Tilda writes the equation 5y = 20x + 8. She wants to rewrite the equation in terms of x. Ater subtracting 8 from both sides of the equation, what number should she divide both sides of the equation by in order to accomplish this goal?

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1 answer

To rewrite the equation \( 5y = 20x + 8 \) in terms of \( x \), Tilda needs to isolate \( x \).

  1. Start with the equation: \[ 5y = 20x + 8 \]

  2. Subtract \( 8 \) from both sides: \[ 5y - 8 = 20x \]

  3. Now, to isolate \( x \), divide both sides of the equation by \( 20 \): \[ x = \frac{5y - 8}{20} \]

So, the number she should divide both sides of the equation by in order to isolate \( x \) is 20.