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2a + (3a -7)

(2x - 3) + x

7 - (5x + 4)

3x - (y - 2x)

-(3a + 6) - 4

-(x - 2y) - 3x

(2p - 1) + (3 + 5p)

(4 - 2x ) - (7x - 2)

(4a - 7b) - (2a + 3b)

-(2p - r) - (2r - p)

Odpowiedź :

Kontonawszystkoviz

[tex]2a + (3a - 7) = 2a + 3a - 7 = 5a - 7[/tex]

[tex](2x - 3) + x = 2x - 3 + x = 3x - 3[/tex]

[tex]7 - (5x + 4) = 7 - 5x - 4 = - 5x + 3[/tex]

[tex]3x - (y - 2x) = 3x - y + 2x = 5x - y[/tex]

[tex] - (3a + 6) - 4 = - 3a - 6 - 4 = - 3a - 10[/tex]

[tex] - (x - 2y) - 3x = - x + 2y - 3x = - 4x + 2y[/tex]

[tex](2p - 1) + (3 + 5p) = 2p - 1 + 3 + 5p = 7p + 2[/tex]

[tex](4 - 2x) - (7x - 2) = 4 - 2x - 7x + 2 = - 9x + 6[/tex]

[tex](4a - 7b) - (2a + 3b) = 4a - 7b - 2a - 3b = 2a - 10b[/tex]

[tex] - ( 2p - r) - (2r - p) = - 2p + r - 2r + p = - p - r[/tex]

Magdaviz

Odpowiedź:

[tex]2a+(3a-7)=2a+3a-7=5a-7\\\\(2x-3)+x=2x-3+x=3x-3\\\\7-(5x+4)=7-5x-4=-5x+3\\\\3x-(y-2x)=3x-y+2x=5x-y\\\\-(3a+6)-4=-3a-6-4=-3a-10\\\\-(x-2y)-3x=-x+2y-3x=-4x+2y\\\\(2p-1)+(3+5p)=2p-1+3+5p=7p+2\\\\(4-2x)-(7x-2)=4-2x-7x+2=-9x+6\\\\(4a-7b)-(2a+3b)=4a-7b-2a-3b=2a-10b\\\\-(2p-r)-(2r-p)=-2p+r-2r+p=-p-r[/tex]

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