-2
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9 x 7 = 63 so the answer is 7
1 x 63, 3 x 21, 7 x 9, 9 x 7, 21 x 3, 63 x 1
7 x 9 = 9 x 7
If: x-9 = 6x+7 then x works out as -3.2
Do you mean, 9(X - 7) = - 7 distribute the 9 on the left 9X = - 63 = - 7 add 63 to both sides 9X = 56 divide both sides by 9 X = 56/9 --------------------------------------------------------------------or, did you mean 9X - 7 = - 7 in which case you can see X = 0