(4y分之3x²)²×3x分之2y+2y²分之x²÷x分之2y²
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![(4y分之3x²)²×3x分之2y+2y²分之x²÷x分之2y²](/uploads/image/f/12368-56-8.jpg?t=%284y%E5%88%86%E4%B9%8B3x%C2%B2%29%C2%B2%C3%973x%E5%88%86%E4%B9%8B2y%2B2y%C2%B2%E5%88%86%E4%B9%8Bx%C2%B2%C3%B7x%E5%88%86%E4%B9%8B2y%C2%B2)
2分之(x+y)+3分之(x-y)=13,(1)3分之(x+y)-4分之(x-y)=3(2)(1)×4+(2)×3得:2(x+y)+(x+y)=52+9;3(x+y)=61;x+y=61/3=122/
【x-y-(x-y分之4y平方)】【x+y-(x+y分之4x平方)】除以【3(x+y)-x-y分之8xy】=(x-y-x+4y)(x+y-x-4x/y)/(3x+3y-x-8x)=3y*(y-4x/y
=(2X/3Y)*(3X/4Y)*(4/xy)=(2x*3x*4)/(3y*4y*xy)=2x/(y^3)
(3x²/4y)²×(2y/3x)+(x²/2y²)÷(2y²/x)=(9x⁴/16y²)×(2y/3x)+(x²/2
3)把①式乘以10,②式乘以6,得:25x+2y=-402x+y=1由下式得y=1-2x,代入上式得25x+2-4x=-4021x=-42x=-2则y=1+4=54)把①式乘以6,②式乘以2得3x-y
①方程乘以18得9x+6y=117③②方程乘以24得8x-6y=36④③+④得x=9带入①得y=6
(3x/y)*(1/4x)*(y/4x)=3/16x
x=三分之五y代入x+y分之x-y消去y得:四分之一
(3x+2y)/4=(2x+y)/5(3x+2y)/4=(x-y+1)/6去分母化简得到:5(3x+2y)=4(2x+y)6(3x+2y)=4(x-y+1)去括号移向化简得7x=-6yx=2/7-8y
9分之5x+4y等于5分之3x+2y等于2分之x-y(同时乘以90,得到)50X+40Y=54X+36Y=45X-45Y所以X=Y=0
3x/4+2y=(2x+y)/5=(x-y+1)/6则3x/4+2y=(2x+y)/5―→15x+40y=8x+4y→7x+36y=0――①(2x+y)/5=(x-y+1)/6―→12x+6y再问:麻
第一个两边乘128(x-y)-3(x+y)=-128x-8y-3x-3y=-125x-11y=-12(1)第二个6x+6y-8x+4y=16-2x+10y=16x-5y=-8(2)(1)-(2)×55
y分之x减y=x/y-1=3/4-1=-1/4有什么不明白可以对该题继续追问请及时选为满意答案,
=3x/(x-4y)-(x+y)/(x-4y)-7y/(x-4y)=(3x-x-y-7y)/(x-4y)=(2x-8y)/(x-4y)=2(x-4y)/(x-4y)=2
因为:3分之x+1=4分之y+3=5分之x+y,所以:(x+1)/3=(y+3)/4=(x+y)/54x+4=3y+94x=3y+55x+5=3x+3y2x=3y-5x=5y=5则x+2y+3分之3x
x-4y分之3x+4y-x分之x+y-x-4y分之7y=3x/(x-4y)-(x+y)/(x-4y)-7y/(x-4y)=(3x-x-y-7y)/(x-4y)=(2x-8y)/(x-4y)=2
x分之4+y分之3=10x分之9-y分之7=-54/x-3/y=10①9/x-7/y=-5②①*123x-4y=120③②*637x-9y=-315④③*36108x-144y=120⑤④*428x-
原式等价于10(x+1)=5(y+3)=4(x+y)10(x+1)=5(y+3)可得2x-y=15(y+3)=4(x+y)可得4x-y=15解得x=7y=13x+2y+3=363x+2y+1=48两式
解方程组(X/2)+Y=2/3X-Y+4=(X/4)+2Y+3方程组变形得:3x+6y==4(1)3x-12y==-4(2)由(1)-(2)得:18y==8y==4/9由(1)*2+(2)得:9x==