a) 2x - (3 - 2x) = 5 + x - x
2x - 3 + 2x = 5
4x - 3 = 5 /+3
4x = 8 /:4
x = 2
b) -(x+1) + 8x = 5x - 9
-x - 1 + 8x = 5x - 9
7x - 1 = 5x - 9 /+1
7x = 5x - 8 /-5x
2x = -8 /:2
x = -4
Odpowiedź:
[tex]a)\\\\2x-(3-2x)=5+x-x\\\\2x-3+2x=5\\\\4x=5+3\\\\4x=8\ \ /:4\\\\x=2\\\\\\b)\\\\-(x+1)+8x=5x-9\\\\-x-1+8x=5x-9\\\\7x-5x=-9+1\\\\2x=-8\ \ /:2\\\\x=-4[/tex]
