rozwiąż równania
a.5(x-1)+2x=2(x+2)+6
b.x+4-5(x-8)=x-6
c.6x-(x-1)=6
d.2(x-1)+3(x-2)=7
e.3(x+2)+2(2x-3)=x-12
f.x(x-2)-(x kwadrat - 2x-3)=2x+1
Na zaraz.
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A
5x-5+2x=2x+4+6
5x-2x+2x=5+4+6
3x=15 / :3
x=5
B
x+4-5x+40=x-6
5x=-4-40-6
5x=42 / :5
x=8,4
C
6x-x+1=6
5x=-1+6
5x=5 / :5
x=1
D
2x-2+3x-6=7
2x+3x=2+6+7
5x=15 / :5
E
3x+6+4x-6= x-12
3x+4x-x =-6+6-12
6x= -12 / :6
x= -2
Ostatniego nie umiem przykro mi...
a) 5x-5+2x=2x+4+6
7x-5=2x+10
5x-2x=10+5
3x=15
x=5
b) x+4-5x+40=x-6
-4x+44=x-6
44+6=x+4x
5x=50
x=10
c) 6x-x+1=6
5x=6-1
5x=5
x=1
d) 2x-2+3x-6=7
5x-8=7
5x=7+8
5x=15
e) 3x+6+4x-6=x-12
7x=x-12
6x=-12
x=-2
f) x kwadrat-2x-x kwadrat+2x-3 = 2x+1
x kwadrat+x kwadrat-2x+2x-3=2x+1
-3=2x+1
-4=2x
2x=-4
x=-2