7X-20=540和4.2乘2.3-2x=3.5
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7X-20=540和4.2乘2.3-2x=3.57X-20=540和4.2乘2.3-2x=3.57X-20=540和4.2乘2.3-2x=3.57X-20=5407X=540+207X=560X=80
7X-20=540和4.2乘2.3-2x=3.5
7X-20=540和4.2乘2.3-2x=3.5
7X-20=540和4.2乘2.3-2x=3.5
7X-20=540
7X=540+20
7X=560
X=80
2.3-2X=3.5
-2X=3.5-2.3
-2X=1.2
-X=0.6
X=-0.6
7X-20=540和4.2乘2.3-2x=3.5
7乘(X-1)乘7=2乘(X+8)3/20比18%=6.5/X求X,
1乘2乘3乘4乘5乘6乘7乘8乘9乘10减x=10000求大神帮助求x
0.2乘6=20%x用方程解,2乘70%x=4.2
x^3+x^2-7x+20=(x+4)乘f(x),那么f(x)=多少
(4.2+x)x35=(x+5.4)x 30 x35和x30是乘35和乘302/3=2x-60/x+50 (250+x)÷25=(210+x)÷23 26x=25x(x+20) 25x是25乘2/3=2x-60/x+50 打错了是2/3=2x-60/x+60是这四题:(4.2+x)x35=(x+5.4)x30 (250+x)÷25=(210+x)÷23 26x=25x(x+20) 2/3=2x-60/x+60
5- x/3+2=7-x 乘x
[x乘x加x乘2x加x乘2x]乘2=360怎么解
X乘5/7乘35=1/2
x乘2x!
26.2-9X=8.24(X+2)=11.64X+0.5乘3=6.75X-3.3=7.31.7X-0.7X=20X-4.5+5.5=158X+5乘7=914.8X+3.4乘6.7=34.785.4X+0.6X=6.63.5(X乘7)=25.913.056除X+3.20.35乘X=8.898(X-3)-5X=275X+20==10024-16X=2.77.5乘6-5X=0.825X-16X=2.73.5乘C(X+50)=238X-12.6=8.4
20x-5乘(1-2x)=2乘(x-2)等于多少
x=(25%x+75x乘20%)乘2+2
3分之2乘x-7=-3分之5乘x,x=多少
8^x减7乘4^x加14乘2^x减8=0
X乘X=6乘X
x乘(x+1)乘(x+2)乘(x+3)=360怎么算
3x+4x-6=36-5x 解7乘(x-8)=31+4x(x-4)乘9=(4-x)乘7x除3+(100-x)乘2=100