用加减消元法解下列方程组:⑴、x+1/3=y+2/4 x-3/4-y-3/3=1/12 ⑵、0.2x+0.5y=0.2 0.4x+0.1y=0.4解方程的步骤一定要清楚一次啊啊!

问题描述:

用加减消元法解下列方程组:⑴、x+1/3=y+2/4 x-3/4-y-3/3=1/12 ⑵、0.2x+0.5y=0.2 0.4x+0.1y=0.4
解方程的步骤一定要清楚一次啊啊!