Question

ofer coroana! URGENT​

Answer 1

Rezolvarea in poza. Sper sa te ajute

Answer 2

$\displaystyle a)~ \frac{5x}{4} =\frac{13}{2} \Rightarrow 5x \cdot 2=13 \cdot 4 \Rightarrow 10x=52 \Rightarrow x=\frac{52}{10} \Rightarrow x=\frac{26}{5}$

$\displaystyle b)~\frac{12}{5} =\frac{4x}{7} \Rightarrow 12 \cdot 7=4x \cdot 5 \Rightarrow 84=20x \Rightarrow x=\frac{84}{20} \Rightarrow x=\frac{21}{5}$

$\displaystyle c)~\frac{25}{6x} =\frac{5}{9} \Rightarrow 25 \cdot 9=5 \cdot 6x \Rightarrow 225=30x\Rightarrow x=\frac{225}{30} \Rightarrow x=\frac{15}{2}$

$\displaystyle d)~\frac{5}{28} =\frac{3}{8x} \Rightarrow 5 \cdot 8x=3 \cdot 28 \Rightarrow 40x=84 \Rightarrow x=\frac{84}{40}\Rightarrow x=\frac{21}{10}$