消元法解二元一次方程组1.已知方程342nmx-5143nmy=8是关于x、y的二元一次方程,则m=_____,n=_______.2.已知(3x+2y-5)2与│5x+3y-8│互为相反数,则x=______,y=________.3.方程2353xyx=3的解是_________.4.若方程组22axbyaxby与234456xyxy的解相同,求(a+b)的值5.用加减消元法解下列方程(1)13yxyx(2)34152410xyxy(3)1464534yxyx(4)12354yxyx(5)132645yxyx(6)1732723yxyx(7)731232mnnm(8)357,234232.35xyxy6.用适合的方法解下列方程组:(1)(2)(3)(4)(5)24513yxyx(6)52252230223xyxyx2273yxxy765432zyzy65732yxyx6341953yxyx