Question

MENTAL MATH Write a question that could be used to solve the equation. Then use mental math to solve the equation. $$\frac{x}{4}=5$$

Short answer

The value of \(x\) which satisfies the equation \(\frac{x}{4}=5\) is 20.

Step-by-step solution

Identify the equation and the unknown

In this case, the equation is \(\frac{x}{4}=5\) and the unknown is \(x\).

Reformulate the equation

To find \(x\), needed to get \(\frac{x}{4}\) equal to 5, you can multiply both sides of the equation by 4. This gives you the new equation: \(x=4*5\).

Solve the equation

Since \(x=4*5\), you just need to multiply 4 by 5. This equals 20, so \(x=20\).