Zadanie 3.
4/7a + 3/7a = a
1/2b + 2 1/2b = 3b
-c + 2c = c
-2d + 3d = d
5e - 3e = 2e
0,5f - 0,5f = 0
Zadanie 5.
2 * 4x = 8x
3x * 5 = 15x
2/5x * 5 = 2x
3/7x * 1/3 = 1/7x
2x * (-5) = -10x
(-2) * 0,2x = -0,4x
(-1/3x) * (-2) = 2/3x
24x : 3 = 8x
6x : (-3) = -2x
Zadanie 6.
2x * 5 2 * x * (-5) 2x * 1/5 2 * (-5) * x 2 * 1/5 * x (-5) * 2 * x
