besarnya x pada gambar adalah...

X/8 = (X+3)/10
10X = 8X+24
2X = 24
X = 12

[tex] \frac{x}{x + 8} = \frac{x + 3}{x + 3 + 10} \\ {x}^{2} + 13x = {x}^{2} + 11x + 24 \\ 2x = 24 \\ x = 12 \: cm[/tex]