1.(2x-1)/2-x+2=(5x+2)/2-(x+3)/6
问题描述:
1.(2x-1)/2-x+2=(5x+2)/2-(x+3)/6
2.①2x-8=-y
②3x+4y=7
答
1.(2x-1)/2-x+2=(5x+2)/2-(x+3)3(2x-1)-6x+12=3(5x+2)-(x+3)6x-3-6x+12=15x+6-x-3-15x=-6x=6/152.2x-8=-y①3x+4y=7②①*3得:6x-13y=24④②*2得:6x+8y=14⑤④-⑤得:-21y=10y=-10/21不一定对啊,打字打得我都蒙...