x-2(y+2)=3 ① 3(2x-5)-8(3y+2)=-1 ② ①②化简x-2y-4=3 6x-15-24y-16=-1再化成为x-2y=7 ①x-4y=5 ②①-②为2y=2y=1把y=1代入①x=9所以x=9 y=1
x-2y-4=3y=(x-7)/2代入下个方程6x-15-24(x-7)/2-16+1=0x=9y=1