x-15%x=42.5
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x-15%x=42.5x-15%x=42.5x-15%x=42.5x-15%x=42.50.85x=42.5x=42.5÷0.85x=50
x-15%x=42.5
x-15%x=42.5
x-15%x=42.5
x-15%x=42.5
0.85x=42.5
x=42.5÷0.85
x=50
x-15%x=42.5
x+x=x+15
x-15%x=42.5解方程
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