Odpowiedź :
Hej hej!
1]
[tex]2(x+1)=5 \ \ |:2\\\\x+1=2,5\\\\x=2,5-1\\\\\boxed{x=1,5}[/tex]
2]
[tex]3(x-2)-7=8\\\\3(x-2)=8+7\\\\3(x-2)=15 \ \ |:3\\\\x-2=5\\\\x=5+2\\\\\boxed{x=7}[/tex]
3]
[tex]2x-(3x+1)=6\\\\2x-3x-1=6\\\\2x-3x=6+1\\\\-x=7 \ \ |:(-1)\\\\\boxed{x=-7}[/tex]
4]
[tex]2-(5+x)=2(3-x)\\\\2-5-x=6-2x\\\\-x+2x=6-2+5\\\\\boxed{x=9}[/tex]
5]
[tex]5(x+1)-2(2x+3)+4x=-x\\\\5x+5-4x-6+4x=-x\\\\5x-1=-x\\\\5x+x=1\\\\6x=1 \ \ |:6\\\\\boxed{x=\frac{1}{6}}[/tex]
Odpowiedź:
a)
2x + 2 = 5 | - 2
2x = 3 |:2
x = 1,5
b)
3x - 6 - 7 = 8
3x -13 = 8 | +13
3x = 21 |:3
x = 7
c)
2x -3x-1 = 6
-x - 1 = 6 |+1
-x = 7 |*(-1)
x = -7
d)
2 - 5 + x = 6 - 2x
2 - 5 = 6 - x |- 6
x = -1
e)
5x + 5 - 4x -6 + 4x = -x
5x - 1 = -x | -5x
-1 = -6x |:-6
[tex]x = \frac{1}{6}[/tex]
Szczegółowe wyjaśnienie: