x/19+y/10=(x+y)*5/77解出来是多少?
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x/19+y/10=(x+y)*5/77解出来是多少?x/19+y/10=(x+y)*5/77解出来是多少?x/19+y/10=(x+y)*5/77解出来是多少?x/19+y/10=(x+y)*5/7
x/19+y/10=(x+y)*5/77解出来是多少?
x/19+y/10=(x+y)*5/77
解出来是多少?
x/19+y/10=(x+y)*5/77解出来是多少?
x/19+y/10=(x+y)*5/77
化简得
2x=3y
有无数解
楼主,二元一次方程,无解的!
祝你好运!
x/19+y/10=(x+y)*5/77解出来是多少?
化简:3(x+y)+5=10y+x
1.5(x+y)+3(x-y)=27(x+y)-3(x-y)=-62.x-y/7 - x+y/10 =1/22(x-y)-5(x+y)=3所谓细节决定成败,
10/x+y+3/x-y=-5 15/x+y-2/x-y=-1(用换元法解此方程组)
(x+y)/6+(x-y)/10=1,(x+y)/6-(x-y)/10=5
3:x=5:y,x比y少10,x=( ),y=( )
若(5x+y)/(7x+10y)=1/2则x/y=
已知x+y=-5,x*x+y*y=19求xy和(x-y)*(x-y)的值
(x+y-5)*(x+y-5)+(x-y+3)=0 x*x-y*y
已知:3x-5y=0,求x/y,x-y/y,x-y/x
X是单数.(77-X)÷X=Y.5,求X和Y
分式的加减:[(x/y-y/x)除以(x+y)+x(1/y-1/x)]除以1+x/y,其中x=5,y=2
{5(x-3y)-6=2x+1 3(x+6y)+4=9y+19 {3分之2(x-y)=4分之x+y-1 6)x+y)=4(2x-y)+16
解下列方程 {x+y=9 (1) {(10y+x)-(10x+y)=9 (2){(10x+y)-3(x+y)=23 (1){5(x+y)+1=10x+y (2){x+y=9 (1){(10y+x)-(10x+y)=9 (2) {(10x+y)-3(x+y)=23 (1){5(x+y)+1=10x+y (2)
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian
5(x-y)³-3(x-y)²+7(x-y)-5(x-y)³+(x-y)²-5(x-y),其中,x-y=1/3.5(x-y)³-3(x-y)²+7(x-y)-5(x-y)³+(x-y)²-5(x-y),其中,x-y=1/3先化简,再求值;
先化简,再求值 [2/3x - 2/x+y(x+y/3x -x-y)]*x/x-y,其中5x+3y=0
x+y=5; x^y+y^x=17