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=4p-2p-2+7
=2p-5
b.3(x+5)-2(x-2)
=3x+15-2x+2
=3x-2x+15+12
=x+27
jumlahkan
3x+4 dan 2x-5
(3x+4)+(2x-5)
=3x+4+2x-5
=3x+2x+4-5
=x-1
mianhae kalo salah