Question

x分之一360=(x+0.3分之306+x-0.2分之360)除2怎么解

Answer 1

2×360/x=306/(x+0.3)+360/(x-0.2)

去分母

720(x+0.3)(x-0.2)=306x(x-0.2)+360x(x+0.3)

720x²+72x-43.2=666x²+46.8x

54x²+25.2x-43.2=0

15x²+7x-12=0

x=(-7±√769)/30