rozwiaz rownania:
2(3x-1)-(4x-3)+x=5(x+2)-3(x-2)-15
zad.2
jacek jest 0 6 lat mlodszy od wojtka.za 8 lat beda mieli razem 28lat.ile lat maja obecnie??
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2(3x-1)-(4x-3)+x=5(x+2)-3(x-2)-15
6x-2-4x+3+x=5x+10-3x+6-15
3x+1=2x+1
x=0
Zad 2
(x +8 ) + ( x -6 +8) = 28
x+8+x+2=28
2x=18
x=9 Wojtek
9-6=3 Jacek
2(3x-1)-(4x-3)+x=5(x+2)-3(x-2)-15
6x -2 -4x +3 +x = 5x +10 -3x +6 -15
6x -4x +x -5x + 3x = 10 +6 -15 +2 - 3
x = 0
zad.2
- wiek Wojtka : X
- wiek Jacka : x -6
(x +8 ) + ( x -6 +8) = 28
x+ 8 +x -6 + 8 = 28
2x +10 = 28
2x = 28 - 10
2x = 18 /:2
x = 9
wiek Jacka : x - 6 = 9 - 6 = 3
Odp. Wojtek ma 9 lat, a Jacek 3 lata.