a)
[tex]15 \div a = \frac{3}{2} | \times a \\ 15 = \frac{3}{2} a | \times 2 \\ 30 = 3a | \div 3 \\a = 10[/tex]
b)
[tex] \frac{2}{5} a - 16 = 24 | + 16 \\ \frac{2}{5} a = 40 | \times 5 \\ 2a = 200 | \div 2 \\ a = 100[/tex]
c)
[tex]7a = 3 - 1 \frac{5}{6} \\ 7a = 1 \frac{1}{6} | \div 7 \\ a = \frac{7}{6} \div 7 \\ a = \frac{7}{6} \times \frac{1}{7} \\ a = \frac{1}{6} [/tex]
Spr.
a)
15 ÷ 10 = 3/2
1,5 = 3/2
L = P
b)
2/5 × 100 - 16 = 24
40-16=24
L = P
c)
7× 1/6 = 3 - 1 5/6
7/6=1 1/6
L = P
