3 X by 4 - 7 by 4 equal to 5 x + 12
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3x/4- 7/4= 5x +12
3x - 7 = 4 (5 x + 12 )
3x - 7 = 20x + 48
-48 -7 = 20x - 3x
- 55 = 17 x
-55/17 = x
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