8.6X-7.2+3.6=6.急,

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8.6X-7.2+3.6=6.急,
8.6X-7.2+3.6=6.急,

8.6X-7.2+3.6=6.急,
8.6X-7.2+3.6=6.8X
8.6x-3.6=6.8x
8.6x-6.8x=3.6
1.8x=3.6
x=3.6÷1.8
x=2
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解 1.8x=7.2-3.6
x=2

8.6X-7.2+3.6=6.8X
8.6x - 3.6 = 6.8x
8.6x - 6.8x = 3.6
1.8x = 3.6
x = 2

8.6x-7.2+3.6=6.8x
8.6x - 6.8x = 7.2 - 3.6
1.8x = 3.6
x = 2

8.6X-7.2+3.6=6.8X
8.6x-3.6 =6.8x
移项,得:8.6x-6.8x=3.6
合并同类项,得:1.8x=3.6
系数化为一,得: x=2

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