slove the following linear equation unknown variable and verify and the solution x/6-2x/7=1/21+x/7
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x/6-2x/7=1/21+x/7
=7x-12x/42-x/7=1/21
=- 5x/42-x/7=1/21
=- 30x-6x/7=1/21
=- 24x=1/21
=- x=1/21×24
=- x=8/7
= x=- 8/7
=7x-12x/42-x/7=1/21
=- 5x/42-x/7=1/21
=- 30x-6x/7=1/21
=- 24x=1/21
=- x=1/21×24
=- x=8/7
= x=- 8/7
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