please answer this question please step by step
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7x - 4 /4x = 3
7x - 4 = 3 ×4x
7x - 4 = 12x
7x - 12x = 4
-5X = 4
X = -4/5
2) 3x - 4 = 21- 2x
3x + 2x = 21+ 4
5x = 25
X = 25/5
X = 5
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