(2a+3b)x+(3a-2b)=12x+5因为方程有无数个解。所以2a+3b=12,3a-2b=5解得a=3,b=2
2ax+3a+3bx-2b=12x+52ax+3bx-12x=5-3a+2b(2a+3b-12)x=5-3a+2bx=5-3a+2b/2a+3b-122a+3b=123a+2b=56a+9b=366a+4b=105b=26 b不等于26/55a=-9 a不等于-9/5
