Rozwiąż równania i nierówności:
a)(8x+16)=32
b)3(2x-3)-20=4
c)(x)+(x+1)=7
d)(5-4x)<_6
e)(6x+4)>2
a)
(8x+16)=32
8x+16=32
8x=32-16
8x=16 /:8
x=2
b)
3(2x-3)-20=4
6x-9-20=4
6x= 4+9+20
6x = 33 /:6
x=33/6
x= 5 i 3/6
c)
(x)+(x+1)=7
x+x+1 = 7
2x= 7-1
2x=6 /:2
x=3
d)
(5-4x)<_6 ( jeżeli jest tu -6) to:
5-4x < -6
-4x < -6 -5
-4x < -11 /:( -4)
x> 11/4
x> 2 i 3/4
e)
(6x+4)>2
6x+24 >2
6x > 24 /:6
x>4
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a)
(8x+16)=32
8x+16=32
8x=32-16
8x=16 /:8
x=2
b)
3(2x-3)-20=4
6x-9-20=4
6x= 4+9+20
6x = 33 /:6
x=33/6
x= 5 i 3/6
c)
(x)+(x+1)=7
x+x+1 = 7
2x= 7-1
2x=6 /:2
x=3
d)
(5-4x)<_6 ( jeżeli jest tu -6) to:
5-4x < -6
-4x < -6 -5
-4x < -11 /:( -4)
x> 11/4
x> 2 i 3/4
e)
(6x+4)>2
6x+24 >2
6x > 24 /:6
x>4