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peny :
4x - 12 - x - 3 = 8
4x - x - 12 - 3 = 8
3x - 15 = 8
3x = 8 + 15
3x = 23
x = 23/3
2) 4p + 6 = 24 - 2p
peny :
4p + 2p = 24 - 6
6p = 18
p = 18/6
p = 3