解方程组:x/4+y/3=3,3(x-4)-2(y-1)=-1
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/05/11 17:08:33
解方程组:x/4+y/3=3,3(x-4)-2(y-1)=-1
x/4+y/3=3①
3(x-4)-2(y-1)=-1 ②
①×12:3x+4y=36③
②得:3x-12-2y+2=-1
3x-2y=9 ④
③-④:6y=27
y=9/2
将y=9/2代入④:3x-2×9/2=9
3x=18
x=6
3(x-4)-2(y-1)=-1 ②
①×12:3x+4y=36③
②得:3x-12-2y+2=-1
3x-2y=9 ④
③-④:6y=27
y=9/2
将y=9/2代入④:3x-2×9/2=9
3x=18
x=6
解方程组{ 3x-4y(x-y)=3 { 2x-3y=1
解方程组:2(x-y)/3-x+y/4=-1 ,6(x+y)-4(2x-y)=16
解二元一次方程组{3(x+y)-4(x-y)=4,x+y/2+x-y/6=1
解方程组3(x+y)-4(x-y)=4和(x+y)/2+(x-y)/6=1
解二元一次方程组:3(x+y)-4(x-y)=4,x+y/2+x-y/6+1
解二元一次方程组{3(x+y)-(x-y)=4,x+y/2+x-y/6=1
1/2x-2y=-74,x-6y=-12解方程组,x/5-y/2=2,2x+3y=4解方程组
解方程组{4/x+y+6/x-y=3, 9/x-y-1/x+y=1
解方程组:{4/x+y+6/x-y=3 9/x-y-1/x+y=1}
一道二元一次方程组!3(x+y)-4(x-y)=4,(x+y)/2+(x-y)/6=1
解方程组:(0.2x+0.1y)/2- (4x-y)/10=(x-y)/5+ (3x+0.5y)/30 (3x+2y-1
解方程组:4(x+1)=3(y+3) x-2y=7y-6x/3