y1-y2=x/2+4-2(3x-5)=3 11x/2=11 x=2
已知y1=二分之+4,y2=3x-5,当x取何值时,y1比y2的2倍大3?y1-y2=x/2+4-2(3x-5)=3 11x/2=11 x=2