Question

Решите уравнение:
у(+2)+3 1/2у+(у-2)=19.5

Answer 1

$y + 2 + 3 \frac{1}{2} y + (y - 2) = 19.5 \\ y + 2 + 3 \frac{1}{2} y + y - 2= 19.5 \\ 5 \frac{1}{2} y = 19.5 \\ y = 19.5 \div 5.5 = \frac{195}{10} \div \frac{55}{10} = \frac{195 \times 10}{10 \times 55} = \frac{39}{11} = 3 \frac{6}{11} \\ y = 3 \frac{6}{11}$