解方程；2/3X+1/2X=42

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解方程；2/3X+1/2X=42解方程；2/3X+1/2X=42解方程；2/3X+1/2X=422/3X+1/2X=42×64x+3x=42×67x=42×6X=362/3X+1/2X=427/6X=

解方程；2/3X+1/2X=42
解方程；2/3X+1/2X=42

解方程；2/3X+1/2X=42
2/3X+1/2X=42×6
4x+3x=42×6
7x=42×6
X=36

2/3X+1/2X=42
7/6X=42
X=36

x=36

2/3X+1/2X=42
4/6 x+3/6 x=42
7/6 x=42
x=36

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