Odpowiedź :
Odpowiedź:
5x - 7 - x = 9 - 2x - 4
5x - x + 2x = 9 - 4 + 7
6x = 12
x = 2
spr:
5 * 2 - 7 - 2 = 9 - 2 * 2 - 4
10 - 7 - 2 = 9 - 4 - 4
1 = 1
Odpowiedź:
[tex]5x - 7 - x = 9 - 2x - 4 \\ 4x - 7 = 5 - 2x \\ 4x + 2x = 5 + 7 \\ 6x = 12 \\ x = 12 \div 6 \\ x = 2 \\ \\ 5 \times 2 - 7 - 2 = 10 - 7 - 2 = 1 \\ 9 - 2 \times 2 - 4 = 9 - 4 - 4 = 1 \\ L = P [/tex]