Question

решите пропорцию (3у-7):5=33:15

Answer 1

$3y - 7 = \frac{33 \times 5}{15} \\ 3y - 7 = 11 \\ 3y = 11 + 7 \\ 3x = 18 \\ x = 18 \div 3 \\ y = 6$