x-x/7=12 (解方程)

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x-x/7=12 (解方程)
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x-x/7=12 (解方程)
x-x/7=12 (解方程)

x-x/7=12 (解方程)
x-x/7=12
7x-x=84
6x=84
x=14

x-x/7=12
6x/7=12
x=12/(6/7)
x=12*7/6
x=14

6x/7=12
x=12*7/6
x=14

6/7x=12 x=72/7

(1-1\7)X=12
6\7X=12
X=14

7x-x=12X7
6x=84
x=14

x-x/7=12
6/7 x =12
x=12/(6/7)
x=2*7=14