7(x+3.2)/2=28
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7(x+3.2)/2=28
7(x+3.2)/2=28
7(x+3.2)/2=28
7(x+3.2)=56
x+3.2=8
x=4.8
4.2-0.6x=3.6x 5x+2x=33.6 7x-4x=0.75 2x+7x+2.1=12 56x-32x-119=361 x+5=2x 3x+9=6x 4x-28=2x 2x+18=7x 5x=25*4-15x 7x-x+2*3=29.4 (28.8+5.5x+3.2)除2=71
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,
方程三道7x-x+2=25.4 x+5=2x 4x-28=2x
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
四道方程:2x+6=5x 6x-28=2x 8(x-3.6)=0.8x 15x-110+7x=110
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
2x+3x+4x+5x+x+6x+7x=100
x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=?
(x+1)/(x+2)+(x+8)/(x+9)解答x+1/x+2+x+8/x+9=x+2/x+3+x+7/x+8
(1)5x-4x=1 (2)4x-7x=2 (3)4.2x-3.2x=36 (4)4/3x-x=(1)5x-4x=1(2)4x-7x=2(3)4.2x-3.2x=36 (4)4/3x-x=3/1
5x+7X[14-X]=28?X是什么?
8x-5.5x=7.57.2x÷3.6=2 3x+6x-8x=0.7 12x-2x-5x=4.512x-x=0 5x+x=1.8 3.2x+1.8x=64.8x-0.8x=6 6.3-0.3x=9.6 8.6x-8.5x=0.720x-2x=36 9x+6x=4.5 18x-12x=5.42x-1.6x=3.6 18x+3x=7×6 1.2x-0.5x=0.71.3x+2.7x=1 4x-3.2x=6.4 0.8x+3.2x+3x=562.8x-2x=7.2
7(x+3.2)/2=28
已知两个函数f(x)=7x-28x-c,g(x)=2x+4x-40x
7x^2-5x=2x^2+x
x-2/3x+x+2/7x=30
27046=2x( )+7x( )+4x( )+6x( )