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2) -2y+23
3) 3z+10
4) -5x-y-4
= 5X-X+3+1
= 4X + 4
2.) (4y-8) dari (2y+15z)
= 2y-4y+15z+8
=-2y+15z+8
3.) (5z+3) oleh (2z-7)
= 5z - 2z + 3 +7
= 3z+10
4.) (6x+4) dari (x-y)
= x-6x-y-4
= -5x-y-4
insyaalloh ini jawabanya bener semua , coba dikoreksi lagi ...