解方程组(1)2/3x+3/4y=5 (2) 7x-4y=5怎么解急
数学 {x/3-y/4=-1 3x-2y=-7 方程组 怎么解
方程组4x+3y=320,5x+2y=330;怎么解
1/2x-2y=-74,x-6y=-12解方程组,x/5-y/2=2,2x+3y=4解方程组
2x-3y=4,5x+6y=7的2元1次方程组怎么解?
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2 解方程组
解方程组 {(x+y)/2+(x-y)/3=6 5(x+y)-2(x-y)=4
解方程组 X+Y/2+X-Y/3=6 4[X+Y]-5[X-Y]=2
解方程组:x+y/2+x-y/3=6 4(x+y)-5(x-y)=12
解方程组 {3(x+y)-4(x-y)=11 {2(x-y)+5(x+y)=27全过程、快
解方程组 {3(x+y)-4(x-y)=11 {2(x-y)+5(x+y)=27
解方程组:(0.2x+0.1y)/2- (4x-y)/10=(x-y)/5+ (3x+0.5y)/30 (3x+2y-1
解三元一次方程组:5x+y+z=1(1) 2x-y+2z=1(2) x+5y-z=-4(3) 急