解方程组:(1)3x+4y= -3.4,6x-4y=5.2

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} 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 解方程组:3x+4y= -3.4,6x-4y=5.2 解方程组｛ 3x-4y(x-y)=3 { 2x-3y=1 解方程组X+Y/2=3X-2Y=10+6X+Y/4 1/2x-2y=-74,x-6y=-12解方程组,x／5-y／2=2,2x+3y=4解方程组 3(x+y)—4(x-y)=4,(x+y/2)+(x-y/6)=1.解方程组