Odpowiedź:
e) 39¾ - x = 15,15
39,75 - x = 15,15
-x = 15,15 - 39,75
x = 24,6
f) -7⅚ + x = 8⅓
x = 8⅓ + 7⅚
x = 16⅙
g) -18,4 + x = 15⅝
x = 15⅝ + 18,4
x = 34,025
h) 30,35 + x = -47⅗
x = -47,6 - 30,35
x = -77,25
k) 5⅝ • x = 18
[tex]x = \frac{18}{5 \frac{5}{8} } = \frac{18}{ \frac{45}{8} } \\ x = 18 \times \frac{8}{45} = \frac{16}{5} \\ x = \frac{32}{10} = 3.4[/tex]
l)
[tex] \frac{7}{9} x = 16 \frac{1}{3} \\ x = \frac{16 \frac{1}{3} }{ \frac{7}{9} } = \frac{49}{3} \times \frac{9}{7} \\x = 7 \times 3 = 21[/tex]
