3/4X-5·X%=17.51又1/2÷(X-0.45)=6/54X-6/5=3X-1/4(X+12)×4/5=42-X

3/4X-5·X%=17.51又1/2÷(X-0.45)=6/54X-6/5=3X-1/4(X+12)×4/5=42-X 6又3/7÷x=10又1/2,x=x÷22又1/5=4/37,x=?1又3/5x=4/9,x=? 4又1/6 -X=2又3/5 2又3/7+X-1有又4/5=3又3/72又3/7+X-1又4/5=3又3/7 1又2/5÷2x=3又1/2 求x的值 x/8+x÷4/3=21 x÷3又1/3-1/5x=20 2/3x+x÷2/3=4/5 x/8+x÷4/3=21 x÷3又1/3-1/5x=20 2/3x+x÷2/3=4/5 已知x=2又2010分之2009,求/x/+/x-1/+/x-2/+/x-3/+/x-4/+/x-5/的值 (3x-2y)(4x-5y)-11(x+y)(x-y)+5xy,已知X=3又1/2,y=2又1/3 以下都是解方程.0.45X-0.54X=0.816又1/2：X=3.25：4X+1/2X=7.51：X=1又2/5：3又1/232.5：X=6.5：2/5 3x^2+5x-(2x^2+5x+10)+x^2,其中x=-1又1/2 3-x=1又5分之2,x= X-2又14分之5=4.375,3又4分之3-（0.83+X）=1.4,X-0.45=6又4分之1 *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 解方程:2又15分之2+X=5又20分之32又15分之2+X=5又20分之34.5-X=2又9分之72X+4又8分之7=4.8753X-2.75=6又4分之1X-(2又3分之1+4又4分之3)=12分之112X+5又5分之1=7又5分之1 4分之3x( )=0.8x( )=2又4分之1x( )=04分之3x( )=0.8x( )=2又4分之1x( )=0.25x( )=( )÷9分之7=1 求x值,三题3又1/2+4=4.7 3.7*5-2x=1又1/2 x-2/9x=49/25 先化简 再求值；[x+1-15/x-1]/x-4/x-1,其中x=5又根号2-4 解未知数X2X+7又1/4=5X-2又3/44.5:1又2/7=1又1/3:(4-X)