Odpowiedź:
4-5x + x = 4-5x + 2x = 4-5x+2x = 4-3x
2 1 2 2 2 2
2x - (7x+1) = 8x - (7x+1) = 8x-7x-1 = 1x-1 = x-1
1 4 4 4 4 4 4
2x+1 + 2(1-x) = 2x+1 + 2-2x = 2x+1+2-2x = 3 = 1
6 6 6 6 6 6 2
2(4x-5) - 3(x+4) = 8x-10 -3x-12 = 5x -22
6 6 6 6
6x-12y + 3 (x-4y) = 6x-12y + 3x - 4y = 9x - 16y
3 3 3 3
2(15a + 20b) - 5( 4a + 8b) = 30a + 40b - 20a -40b = 10a = a
10 10 10 10
3(7k+21) - 7(3k-9) = 21k- 63 - 21k + 63 = 0 = 0
42 42 42 42
4(3p +6) + 9 (10- 5p) = 3p+ 6 + 3(10- 5p) = 5( 3p+6) + 9( 10-5p) =
12 15 3 5 15 15
15p+30 +90 - 45p = -30p +120 = 15 ( -2p + 8) = - 2p+8
15 15 15
Szczegółowe wyjaśnienie:
POMOŻE :)
