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4x = 7-3
4x = 4
x = 1
3x - 3 = 4
3x = 4 + 3
3x = 7
x = 7/3 = 2 1/3
2. 2x + 3 = 4x + 5
2x - 4x = 5 - 3
-2x = 2
x = -1
5x + 3 = 3x + 5
5x + 3x = 5 -3
8x = 2
x = 2/8=1/4