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Anonymous
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7x - 4x = 27 3x = 27 x = 27/3 x = 9 Therefore, the number is 9. :)
If you mean: 4x -4y = 12 and -7x +4y = -36 then x = 8 and y = 5
-3/2
4x+35-2x+25 = 6 2x+60 = 6 2x = 6-60 2x = -54 x = -27
It is +4x