Odpowiedzi

2010-03-30T20:31:28+02:00
A) 3x + a = 2x + 1
a = 1 + 2x - 3x
a = 1 - x
b) 2(x + m) = m - 4x + 5
2x + 2m = m - 4x + 5
2m - m = 5 - 4x - 2x
m = 5 - 6x
c)-x+a+b=2a-3b-2x
-x+2x=2a-a-3b-b
x=a-4b
d)x-3(n+2x)=4n+2x
x-3n-6x=4n+2x
x-6x-2x=4n+3n
-7x=7n//-7
x=-n