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Nomor 1:
a.2x-4x+3y+5y
=-2x+8y
b.3x-7x+4x-2y
=-4x+2y
c.4x+8x-2y+6y
=12x+4y
Nomor 2:
a.2x+6x-3y+2
=8x-3y+2
b.2x+2y+7y-2
=2x+9y-2
c.3x-7x+2y+8
=-4x+2y+8
di cek lagi yaa takut salah