（16x-13)/(4x-3)+（40x-43)/(8x-9)=（32x-30)/(8x-7)+（20x-24)/(4x-5)4-1/（4x-3）+5+2/（8x-9）=4-2/（8x-7)+5+1/(4x-5)2/（8x-9）+2/（8x-7)=1/（4x-3）+1/(4x-5)2(8x-9+8x-7)/[(8x-9)(8x-7)]=(4x-3+4x-5)/[(4x-...