Odpowiedź :
Odpowiedź:
[tex]a)\\\\3(x+3)=x-5\\\\3x+9=x-5\\\\3x-x=-5-9\\\\2x=-14\ \ /:2\\\\x=-7\\\\\\b)\\\\4-x=(36-3x)-(2x+28)\\\\4-x=36-3x-2x-28\\\\4-x=8-5x\\\\-x+5x=8-4\\\\4x=4\ \ /:4\\\\x=1[/tex]
Zadanie
A)
3(x + 3) = x - 5
3x + 9 = x - 5 l -9
3x = x - 14 l -x
2x = -14 l :2
x = -7
B)
4 - x = (36 - 3x) - (2x + 28)
4 - x = 36 - 3x - 2x - 28
4 - x = 8 - 5x l -4
-x = 4 - 5x l +5x
4x = 4 l :4
x = 1