Question

Решите уравнение
1) 1/3x+1/5x+1/6x=21/40
2) 1/4x+1/6x+1/8x=39/56

Answer 1

Ответ:

1) 1/3x+1/5x+1/6x=21/40

x(1/3+1/5+1/6)=21/40

x×7/10=21/40

x=(21/40)/(7/10)

x=3/4