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2x+x
22+2x = 37+6+x 2x-x = 37+6-22 x = 21
so 3x + 2 = x + 12 ie 2x = 10 x =5
2x + 5 = 13 2x = 8 2x/2 = 8/2 x=4
6 + 2x = x - 6 2x - x = -6 -6 x = -12
2x + 7 + 2x = 23 4x + 7 = 23 4x = 16 x = 16/4 x = 4