tolong di jawab no. 2. dari a-d! please pake cara!

a)
24 : (x + 7) = 16 : 10
[tex] \frac{24}{(x + 7)} = \frac{16}{10} [/tex]
16 (x + 7) = 24 × 10
16 (x + 7) = 240
[tex]x + 7 = \frac{240}{16} [/tex]
x + 7 = 15
x = 15 - 7
x = 8

b)
(5x - 2) : 72 = 18 : 27
[tex] \frac{(5x - 2)}{72} = \frac{18}{27} \\ 5x - 2 = 18 \times \frac{72}{27} [/tex]
5x = 48 + 2
[tex]x = \frac{50}{5} [/tex]
x = 10

c)
8 : 10 = (y + 15) : 25

8 = y + 15
10 = 25

10(y + 15) = 25 × 8
10y + 150 = 200
10y = 200 - 150
10y = 50
y = 5

d)
21 : 28 = 24 : (3y - 4)
21 (3y - 4) = 24 × 28
63y - 84 = 672
63y = 672 + 84
63y = 756
y = 756 : 63
y = 12