a)
2(3x-4) = 10x
6x -8 = 10x
-4x = 8
x = -2
b)
-4x = 3(6-2x)
-4x = 18 - 6x
2x = 18
x = 9
c)
4 -3x = 5(2-x)
4-3x = 10 -5x
2x = 6
x = 3
d)
-3x + 6 = 3(2-x)
-3x + 6 = 6 -3x
0=0
rownanie tozsamosciowe
e)
6(x+4) = 5x + 1 + x
6x + 24 = 6x + 1
0 = -23
rownanie sprzeczne
f)
-2(5x + 2) = 3 - 9x
-10x -4 = 3-9x
-x = 7
x = -7
g)
5-(3-4x) = 5(1-x)
5-3+4x = 5-5x
9x = 3
x = 1/3
h)
-2(4-5x) = 3(4x+3)
-8 + 10x = 12x + 9
-2x = 17
x = -17/2 = -8,5
i)
3-3(x+1) = -(4x + 1)
3-3x -3 = -4x - 1
x = -1
