方程题3x+18=5x
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方程题3x+18=5x方程题3x+18=5x方程题3x+18=5x3x+18=5x18=5x-3x18=2xx=93x-3x+18=5X-3X18=2XX=93X+18=5X18=2X9=X18=2x
方程题3x+18=5x
方程题3x+18=5x
方程题3x+18=5x
3x+18=5x
18=5x-3x
18=2x
x=9
3x-3x+18=5X-3X
18 = 2X
X= 9
3X+18=5X
18=2X
9=X
18=2x
x=9
x=9
3x+18=5x
3x+18=5x
18=5x-3x
18=2x
x=18/2
x=9