Rozwiąz równania a)3x+2=x-4 b)5x-2=1 c)-x-1=-2x-2 d)x+2=x-1 e)2x+3=21-x f)3(y+1)=2y g)2x+4=2(x+2) h)-5(x+4)+2(-3x+1)=-x+7 Prosze o dobre rozwiązanie.Bardzo to potrzebuje daje naj
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a)3x+2=x-4
3x-x=-4-2
2x=-6
x=-3
b)5x-2=1
5x=1+2
5x=3
x=3/5
c)-x-1=-2x-2
-x+2x=-2+1
x=-1
d)x+2=x-1
x-x=-1-2
0≠-3
e)2x+3=21-x
2x+x=21-3
3x=18
x=6
f)3(y+1)=2y
3y+3=2y
3y-2y=-3
y=-3
g)2x+4=2(x+2)
2x+4=2x+4
2x-2x=4-4
0=0
h)-5(x+4)+2(-3x+1)=-x+7
-5x-20-6x+2=-x+7
-11x-18=-x+7
-11x+x=7+18
-10x=25
x=-25/10
x=-2,5
licze na naj
a)3x+2=x-4
3x - x = - 4 - 2
2x = -6 /:2
x = -3
b)5x-2=1
5x = 3 /:5
x = 3/5
c)-x-1=-2x-2
- x + 2x = -2 + 1
x = -1
d)x+2=x-1
x - x = -3
0 = 3 nie da sie
e)2x+3=21-x
3x = 18 /:3
x = 6
f)3(y+1)=2y
3y +3 = 2y
y = -3
g)2x+4=2(x+2)
2x + 4=2x+4
2x- 2x = 4 - 4
0 = 0
h)-5(x+4)+2(-3x+1)=-x+7
-5x - 20 -6x +2 = -x + 7
-20 - 7 + 2 = 5x + 6x - 1
-25 = 10x /:10
x = -2,5