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A) 8 (x-1) + 2 = 5x +3
8x - 8 + 2 = 5x + 3
3x = 9
x = 3
B) 5 - x/2 = x+2/4
20 - 2x = x + 2
-3x = -18
x = 6
C) 12 (x-2) + 6=6(2x-3)
12x - 24 + 6 = 12x - 18
0 = 0
Spełnia je każda liczba
D) 1 1/2x + 3 = 6x+1/4
3/2x + 3 = 6x + 1/4
6x + 12 = 24x + 1
-18x = - 11
x = 11/18
ZADANIE 2.
A) 8 (x-1) + 2 = (x + 4) + 16
8x - 8 + 2 = x + 4 + 16
8x - 6 = x + 20
7x = 26
x = 26/7
B) -x = 2(x - 1) + 3 (x - 2) + 4 (x - 3)
-x = 2x - 2 + 3x - 6 + 4x - 12
-x = 9x - 20
-10x = -20
x = 2
C) 1/7x +2 = 6/7(x - 14) + 9
x + 14 = 6(x-14) + 63
x + 14 = 6x - 84 + 63
x + 14 = 6x - 21
-5x = -35
x = 7
D) 0,2 (4x - 15) + 6 = 0,5x + 6
2(4x - 15) + 60 = 5x + 60
8x - 30 = 5x
3x = 30
x = 10