17x+13=7x+38 1.9+0.75x-0.1=x 13x-3x=72=12x=30 9.4x-120=8.4x=17x-200 15.2x-0.8=7.4x+7
问题描述：
17x+13=7x+38 1.9+0.75x-0.1=x 13x-3x=72=12x=30 9.4x-120=8.4x=17x-200 15.2x-0.8=7.4x+7
0.9x-0.5x+0.28=x+0.1
答
17x+13=7x+38移项,得,17x-7x=38-13合并同类项,得,10x=25两边同除以10,x=2.51.9+0.75X-0.1=X0.75X-X=0.1-1.9-0.25X=-1.8X=7.213X-3X=72+12X+3013X-3X-12X=72+30-2X=102X= -519.4X-120=8.4X+17X-2009.4X-8.4X-17X=-200...