Question

6) calcula x sí x/12 =20/48

7) calcula x si x/16 =30 /24

​

Answer 1

$\frac{x}{12} = \frac{20}{48} \\ \\ \frac{x}{12} = \frac{5 \times 4}{12 \times 4} \\ \\ \frac{x}{12} = \frac{5}{12} \\ \\ x = 5 \\ \\ \\ \\ \frac{x}{16} = \frac{30}{24} \\ \\ \frac{x}{16} = \frac{6 \times 5}{6 \times 4 } \\ \\ \frac{x}{16} = \frac{5}{4} \\ \\ \frac{x}{4 \times 4} = \frac{5 \times 4}{4 \times 4} \\ \\ x = 5 \times 4 \\ \\ x = 20$