4.5+x=6.2 x-3.8=6.6 4x=1 5x+7=42 2(x-5)=5.8 3.6x-x=5.8
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4.5+x=6.2x-3.8=6.64x=15x+7=422(x-5)=5.83.6x-x=5.84.5+x=6.2x-3.8=6.64x=15x+7=422(x-5)=5.83.6x-x=5.84.
4.5+x=6.2 x-3.8=6.6 4x=1 5x+7=42 2(x-5)=5.8 3.6x-x=5.8
4.5+x=6.2 x-3.8=6.6 4x=1 5x+7=42
2(x-5)=5.8 3.6x-x=5.8
4.5+x=6.2 x-3.8=6.6 4x=1 5x+7=42 2(x-5)=5.8 3.6x-x=5.8
(1)x=6.2-4.5=1.7
(2)x=6.6+3.8=10.4
(3)x=1/4=0.25
(4)x=(42-7)÷5=7
(5)x=5.8÷2 +5=7.9
(6)x=5.8÷2.9=2
4.5+x=6.2 x-3.8=6.6 4x=1 5x+7=42 2(x-5)=5.8 3.6x-x=5.8
（X+X)+(X-X)+(X*X)+(X/X)=100
13x-（4.5x+2.9)=0.5x+3.8×0.5
x*x*x*x*x=80000?
4X-3.8=25.9-4.5x
2X-3.8=25.9-4.5x
4.5x=2.5x+3.8
3.8x-0.8x=4.5
4.8x+6.2x-x=4.8
9x+7x-x=4.5
6.6x +x=24.
10x -6.2x-2x=36 x=?
3.8 x-x=0.56
3.8x-x=5.
20%x+20%x×30%x-20%x=4.5
6.5x-4.5x=93.6-6.5x-3.5x
4.5x+x=12
x+4.5x=0.