Odpowiedź :
Odpowiedź:
a)
1/2x-4=x-6 / *2
x - 8 = 2x - 12
x- 2x = -12 +8
-x = -4 / *(-1)
x=4
b)
x-5=1/3x+1 / *3
3x - 15 = x + 3
3x - x = 3 +15
2x = 18 /:2
x = 9
c)
x/4 - 1/4=2 /*4
x - 1 = 8
x = 8 +1
x=8
d)
x/5-3=x+1/5 / *5
x - 15 = 5x + 1
x- 5x = 1 +15
-4x = 16 / :(-4)
x = - 4
e)
5/6(x-1)=4 / * 6
5(x-1) = 24
5x - 5 = 24
5x = 24 +5
5x= 29 /:5
x= 29/5
x = 5 i 4/5
f)
-1/2(-x-6)= -x / *2
-( -x - 6 ) = -2x
x + 6 = - 2x
x + 2x = -6
3x= -6 / : 3
x= -2
Szczegółowe wyjaśnienie:
Odpowiedź:
a) 1/2x-4=x-6 /+4
1/2x = x-2 /-x
-1/2x = -2 /*(-2)
x = 4
b) x-5=1/3x+1 /+5
x = 1/3x + 6 /*3
3x = x + 18 /-x
2x = 18 /:2
x = 9
c) x/4 - 1/4 = 2 /*4
x - 1 = 8 /+1
x = 9
d) x/5 - 3 = x + 1/5 /*5
x - 15 = 5x+ 1 /-x
-15 = 4x + 1 /-1
-16 = 4x /:4
x = -4
e) 5/6 * (x-1) = 4
5/6x -5/6 = 4 /*6
5x - 5 = 24 /+5
5x = 29 /:5
x = 29/5
x = 5,8
f) -1/2 * (-x-6) = -x
1/2x + 3 = -x /*2
x + 6 = -2x /-x
6 = -3x /*(-1)
-6 = 3x /:3
x = -2