两道解二元一次方程题(要带全部过程)急!
问题描述:
两道解二元一次方程题(要带全部过程)急!
(1)【4(x-y-1)=3(1-y)-2,
【x/2+y/3=2;
(2)【2(x-y)/3+(x+y)/4=-1,
【6(x+y)-4(2x-y)=16;
答
(1)【4(x-y-1)=3(1-y)-2,4x-4y-4=3-3y-2,4x-y=5,8x-2y=10【x/2+y/3=2,3x+2y=12,11x=22,x=2,y=3(2)【2(x-y)/3+(x+y)/4=-1,8(x-y)+3(x+y)=-12,8x-8y+3x+3y=-12,11x-5y=-12【6(x+y)-4(2x-y)=16,6x+6y-8x+4y=1...