Rozwiąż równania:
a) 2*(x+1)=4
b)4=2*(x-1)
c)3*(x-2)=x
d)3*(2x+3)=x-1
e)4*(x-1)=3(x+1)
f)-(x+1)=2
g)(x+1)-(x-1)=1
h)-1/5*(2+x)=3/4x
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a) 2*(x+1)=4
2x+2=4
2x=2 /:2
x=1
b)4=2*(x-1)
4=2x-2
6=2x /:2
x=3
c)3*(x-2)=x
3x-6=x
3x=x+6
2x=6 /:2
x=3
d)3*(2x+3)=x-1
6x+9=x-1
5x+9 =-1
5x=-10 /:5
x=-2
e)4*(x-1)=3(x+1)
4x-4=3x+3
4x=3x+7
x=7
f)-(x+1)=2
-x-1=2
-x=3
g)(x+1)-(x-1)=1
2x+1-1=1
2x=1
x=0,5
h)-1/5*(2+x)=3/4x
-2/5 - 1/5x = 3/4x
-2/5= 1/5x + 3/4x
-0/2= 19/20x
a) 2*(x+1)=4
2x+2=4
2x=4-2
2x=2 |:2
x=1
b) 4=2*(x-1)
4=2x-2
-2x=-2-4
-2x=-6 |:(-2)
x=3
c) 3*(x-2)=x
3x-6=x
3x-x=6
2x=6 |:2
x=3
d) 3*(2x+3)=x-1
6x+9=x-1
6x-x=-1-9
5x=-10 |:5
x=2
e) 4*(x-1)=3(x+1)
4x-4=3x+3
4x-3x=3+4
x=7
f) -(x+1)=2
-x-1=2
-x=2+1
-x=3 |:(-1)
x=-3
g) (x+1)-(x-1)=1
x+1-x+1=1
2x+2=1
2x=1-2
2x=-1 |:2
x=-0,5
h) -1/5*(2+x)=3/4x
-3-2/5x=3/4x
-2/5x-3/4x=3
-1,3x=3 |:-1,3
x=-9
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