3.7x+2.5-3.6x=6.45

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3.7x+2.5-3.6x=6.453.7x+2.5-3.6x=6.453.7x+2.5-3.6x=6.453.7x-3.6x=6.45-2.50.1x=3.95x=3.95÷0.1x=39.5很高兴

3.7x+2.5-3.6x=6.45
3.7x+2.5-3.6x=6.45

3.7x+2.5-3.6x=6.45
3.7x-3.6x=6.45-2.5
0.1x=3.95
x=3.95÷0.1
x=39.5
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