84÷х=2×2 х=84÷4

Let's solve the equation step by step.

1. Start with the equation: \[ 84 ÷ x = 2 × 2 \]

2. Calculate \(2 × 2\): \[ 2 × 2 = 4 \]

3. Substitute this back into the equation: \[ 84 ÷ x = 4 \]

4. To solve for \(x\), you can rearrange the equation by multiplying both sides by \(x\): \[ 84 = 4x \]

5. Now, divide both sides by 4: \[ x = \frac{84}{4} \]

6. Simplifying \(\frac{84}{4}\): \[ x = 21 \]

So, \(x = 21\).