a) 5x + (2x + 4x) - (7x - 8y) - x + (2 - 6y)=5x+6x-7x+8y-x+2-6y=3x+2y+2b) -5x + (-2y + 4x) - (7x - 8y) - x + (2 - 6y)=-5x-2y+4x-7x+8y-x+2-6y=-9x+2c) -9z - (4 - 3z) - 8y - (-7z + 8y) + (-2 - 7)=
-9z-4+3z-8y+7z-8y-2-7=z-16y-13
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a) 5x + (2x + 4x) - (7x - 8y) - x + (2 - 6y)=
5x+6x-7x+8y-x+2-6y=3x+2y+2
b) -5x + (-2y + 4x) - (7x - 8y) - x + (2 - 6y)=
-5x-2y+4x-7x+8y-x+2-6y=-9x+2
c) -9z - (4 - 3z) - 8y - (-7z + 8y) + (-2 - 7)=
-9z-4+3z-8y+7z-8y-2-7=z-16y-13
Odpowiedź: