9x + 14 = 2x-7
4x + 13 = x - 26
30x + 21 = 7x - 48
6,2x + 1,8 = 4,7x + 7,8
5+14x + 1 = 17x - 4 + 2x
18 + 10x - 13 = 17x + 21 - 11x


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