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a) x+x = 2x
x+3x ,= 4x
3/4x+x ,= 7/4x
x+0,5x = 1,5x
, 1,2x+x = 2,2x
b) 5x+2x = 7x
3x+0,6x = 3,6x
2x+3/4x = 11/4x
3x+x/2 (mnożymy * 2) = 6x + x = 7x
0,6+1,2x = 0,6 (2x + 1)
c) x-1/2x , = 1/2x
x-1/3x ,= 2/3x
x-3/4x , = 1/4x
x-0,6x , = 0,4x
x-0,85x = 0,15x
zad.5
Spośród podanych jednomianów wybierz jednomiany podobne
a) 3a, i -5a
1/2a2, i 3/4a
b) 6x3, i 6x2,
x3, i -x3
zad.7
Zastąp symbole odpowiednimi jednomianami
3ab2 = 3b * a2
6a3b = -3a2b * (-2a)
-4p2r3 = 1/2pr2 * -8pr
2x; 4x; 1,75x; 1,5x; 2,2x
b)
7x; 3,6x; 2,75x; 3,5x; 1,8x
c)
0,5x; 2/3 x; 0,25x; 0,4x; 0,15x
5. a) 3a-5a+0,75a=-1,25a
b) 6x3 + x3 - x3 = 6x3
7.
2a
-3a2b
-8pr