(7+2.3-x)÷2=3.1
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(7+2.3-x)÷2=3.1(7+2.3-x)÷2=3.1(7+2.3-x)÷2=3.1(7+2.3-x)÷2=3.1=(9.3-x)÷2=3.1=(9.3+x)÷2×2=3.1×2=9.3+x=6
(7+2.3-x)÷2=3.1
(7+2.3-x)÷2=3.1
(7+2.3-x)÷2=3.1
(7+2.3-x)÷2=3.1
= (9.3-x)÷2=3.1
=(9.3+x)÷2×2=3.1×2
= 9.3+x=6.2
= 9.3+x-x=6.2-x
= 9.3=6.2-x
= 9.3+6.2=6.2-x+6.2
= x=15.5
(7+2.3-x)÷2=3.1
1.(x-3)÷2=7.5 2.3x+x=30 3.15x+x=40 4.2.5x-6=18.5 5.3x+7=59.2
x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,
x/x-2+x-9/x-7=x+1/x-1+x-8/x-6,
解方程:6.9x=23.12 6(x+2)=72 6.8x+2.3×=30.02 (9-4.5)x=4.5 6.8x+2.3×3=30.02 x÷(6.3-2.3)=1.16.8x+6.9x=27.4 1.8(x+0.2)=7.2 3x-4×6=48 6x+7x=26 x+3.5×3=18
x-3/7x=x÷2+20
(5x+7x)÷2x=
先化简,再求值(x^2/x+2-4/x+2)÷2-x/x,其中x=-7/4
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
如何解下列分式方程解下列方程 1.x/2x²-11x-21=x+7/x²-12x+35 2.x-4/x²+x-2=1/x-1+x-6/x²-4 3.1/x+7=x+1/(2x-1)(x+7)+1/2x²-3x+1
如何解下列方程解下列方程 1.x/2x²-11x-21=x+7/x²-12x+35 2.x-4/x²+x-2=1/x-1+x-6/x²-4 3.1/x+7=x+1/(2x-1)(x+7)+1/2x²-3x+1
如何解下列分式方程解下列方程 1.x/2x²-11x-21=x+7/x²-12x+35 2.x-4/x²+x-2=1/x-1+x-6/x²-4 3.1/x+7=x+1/(2x-1)(x+7)+1/2x²-3x+1
21分之10x÷3分之2=7分之3x-3分之1x-2分之1x=190x-53x=7408.5x-6.9x=43.3x-200=0.2x+1101.02+0.4x+2.6x=3.428.9x-67=4.5x+656x-58=3x+1410x-20=5x+806x+5=10x-3420-1.4x=9.8x-288.2x+5.4x=272
x-2/(x^2-9)(1+(2x-7/x^2-4x+4)÷(x+1)/(x+3)其中x=2010
解下列方程.7(5x-3)=10.5 6.5x-x=7.7 4x+x=15解下列方程.7(5x-3)=10.5 6.5x-x=7.74x+x=15 2.3x6+7x=18(4x-6)÷2=28
先化简 再求值[(2x)²(x+1)²-3x²(x²+8/3x-1)-7x²]÷x³ 其中x=-2
解方程,5%x-7.5%x=22.5 25%x-7%x=36 2.3%x+x%=6.6 x-30%x=1.4 x÷50%=10 65%x-25%x=8
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2