(x-2)(x-3)+2(x-6)(x-5)=3(x²-7x+15)
x²-5x+6+2(x²-11x+30)=3x²-21x+45
x²-5x+6+2x²-22x+60=3x²-21x+45
3x²-27x+66=3x²-21x+45
6x=21
x=3.5