Question

Rozwiąż równania i nierówności
a) ( ×-7)=4
b) (×+5)<1
c) (2×-1)-2=0
d) (×-5)>4

Answer 1

A) ( ×-7)=4
x-7=4
x=4+7
x=11
b) (×+5)<1
x+5<1
x<1-5
x<-4
c) (2×-1)-2=0
2x-1-2=0
2x=2+1
2x=3/:2
x=1 i 1/2
d) (×-5)>4
x>4+5
x>9

Answer 2

-7x=4 /7
x= 7/4
x= 1i 3/4

5x<1 /5
x>0,2

2x-3=0
2x=-3
?

-5x>4
x= 4/5

Answer 3

( ×-7)=4

x = 4 + 7
x =11




(×+5)<1

x < 1 - 5
x < -4





(2×-1)-2=0

2x = 0 + 1 + 2

2x = 3 | : 2
x = ⅔





(×-5)>4

x > 4 + 5
x > 9