求{3(x-1)+2(y+1)=8 2(x-1)-3y=1解方程要过程求{0.5x-3y=-1 -2分之1x+5y-3=0_数学解答

求{3(x-1)+2(y+1)=8 2(x-1)-3y=1解方程要过程求{0.5x-3y=-1 -2分之1x+5y-3=0

人气：365 ℃　时间：2020-05-13 19:12:52

解答

3(x-1)+2(y+1)=8 ①2(x-1)-3y=1②由①得3x+2y=9③由②得2x-3y=3 ④③*3+④*2得 13x=33解得X=33/13,代入③,解得Y=9/13∴x=33/13y=9/13 0.5x-3y=-1 ①-1/2x+5y-3=0 ②①+②得2y=2解得y=1代入①得0.5...