25 /45 = x /3,5

To solve the equation \( \frac{25}{45} = \frac{x}{3.5} \), you can use cross-multiplication. This means multiplying across the equals sign: \[ 25 \times 3.5 = 45 \times x \] Calculating \( 25 \times 3.5 \): \[ 25 \times 3.5 = 87.5 \] So, we have: \[ 87.5 = 45x \] Next, solve for \( x \) by dividing both sides by 45: \[ x = \frac{87.5}{45} \] Calculating \( \frac{87.5}{45} \): \[ x \approx 1.9444 \] So, the value of \( x \) is approximately \( 1.9444 \).