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b ) - 1 bo 8 × -1 + 7 = 4 × - 1 + 3
c ) 1 bo 3(1-1)=0
2x-1=1
2 * 3 -3 = 3
6 - 3 = 3
3 = 3
b) 8x + 7 = 4x + 3
8 * -1 +7 = 4 * -1 +3
-8 + 7 = -4 + 3
-1 = -1
c) 3(1 - x) = 0
3 * 1 - 3 * 1 = 0
3 - 3 = 0
0 = 0
zad.2
2x - 1 = 1
2*1 -1 = 1
2 - 1 = 1
1 = 1
3x + 2 = 2x + 4
3 * 1 +2 = 2 * 1 + 4
3+2 = 2+4
5 = 6
0,5x - 3/2 = 2x - 3
0,5 * 1 - 3/2 = 2 * 1 -3
1/2 - 3/2 = 2 - 3
- 2/3 = - 1