Explicație pas cu pas:
a)
[tex]\frac{x}{3} = \frac{1}{4} \implies x = \frac{3}{4} \\ [/tex]
b)
[tex]\frac{x}{11} = \frac{1}{3} + \frac{2}{3} \\ \frac{x}{11} = \frac{3}{3} \\ \frac{x}{11} = 1\implies x = 11[/tex]
c)
[tex] \frac{8}{x} = \frac{2}{3} \\ x = \frac{3 \times 8}{2}\implies x = 12[/tex]
d)
[tex]\frac{2}{7}x = \frac{4}{21} \\ x = \frac{7 \times 4}{2 \times 21} \implies x = \frac{2}{3} [/tex]
e)
[tex]x \div \frac{6}{11} = \frac{33}{4} \\ x = \frac{33}{4} \times \frac{6}{11}\implies x = \frac{9}{2} [/tex]
f)
[tex]3 \frac{1}{4} + x = 5 \frac{1}{2} \\ x = \frac{10 + 1}{2} - \frac{12 + 1}{4} \\ x = \frac{11}{2} - \frac{13}{4} \\ x = \frac{22 - 13}{4} \\ \implies x = \frac{9}{4} \iff x = 2 \frac{1}{4} [/tex]
