1.3x+2y=442x+3y=46x=?y=?( )2.（13.5-81/4-4.75）÷【11/2（A+13/4÷

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1.3x+2y=44
2x+3y=46
x=?y=?
( )
2.（13.5-81/4-4.75）÷【11/2（A+13/4÷ 11/7）】=1/30
2.13.5-81/4-4.75）÷【11/2（A+13/4÷ 11/7）】=1/30
A+1又3/4÷11/7

1、 3x+2y=44①
2x+3y=46②
①x3 得 9x+6y=132
②x2 得 4x+6y=92
①-② 得 5x=40
x=8
将x=8代入①得 24+2y=44
2y=20
y=10
第二题算出来了- -答案很诡异,260.126942
题目有问题吗-

1.3x+2y=442x+3y=46x=?y=?( )2.（13.5-81/4-4.75）÷【11/2（A+13/4÷ 数学题……555{(3x+y)(3x-y)-(x-5y)(5x-y)-(x-2y)²÷(-4x),x=-2.y 3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27 2x-y=2,求[(x²+y²)-(x-y)²+2y(x-y)]÷4y [x(x-y)-y(x-y)+(x+y)(x-y)]÷2x其中x=2012 y=2013 {3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1 x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20 {(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20 4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6 (x+y)(x+2y)(x+3y)(x+4y)=-40 已知x-2y=2011,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷4x的值. 化简求值:[(x+y)(x-y)-(x-y)²+2y(x-y)]÷4y,其中x=二分之一,y=2