Question

5x supra 4 = 20 supra x​

Answer 1

5x/4=20/x<=>5x²=80

x²=16

x=radical din 16=4

Answer 2

$\frac{5x}{4} = \frac{20}{x}$

$5x \times x = 20 \times 4$

$5 {x}^{2} = 80$

${x}^{2} = 80 \div 5$

${x}^{2} = 16$

$x = \sqrt{16}$

$x = 4$