x+2.3-0.2x=10.5
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x+2.3-0.2x=10.5x+2.3-0.2x=10.5x+2.3-0.2x=10.5（2.3-0.2）X=10.52.1X=10.5X=10.5除以2.1X=5
x+2.3-0.2x=10.5
x+2.3-0.2x=10.5
x+2.3-0.2x=10.5
（2.3-0.2）X=10.5
2.1X=10.5
X=10.5除以2.1
X=5
x+2.3-0.2x=10.5
（X+X)+(X-X)+(X*X)+(X/X)=100
x-30-0.2x=0.5x
x-0.2x=80 求x
4.5x-x=10.5
x+10.5=4x
(X-8)/X=0.2(X-8)/X=0.2
(x-1)+(x+2)+0.2x+2x=46
X-X×0.2=1.18
x-0.2.x=180
x-0.2x=36
x=120+(x ×0.2)
x*x*x*x*x=80000?
0.2x+0.4x=12 x=?20x+x=420 x=?
5x-4x=2*1.8,5x-2+3x=3.6,x+4x=20.3,8x+10-3x=30,10.5-0.5x+0.5=1,x+2x+5x=10,解方程,5x-4x=2*1.8,5x-2+3x=3.6,x+4x=20.3,8x+10-3x=30,10.5-0.5x+0.5=1,x+2x+5x=10,0.8x-0.2+1.2x=1.8,2.4x+0.6+1.6=8
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*x*x=504 x*x*x=504
（x+x）+(x-x)+(x/x)=11.2