1) 2) 3)
1]
(x-3)/2 +3x - x/5=2x-(x+1)/2 /*10
5(x-3)+30x-2x=20x-5(x+1)
5x-15+28x=20x-5x-5
33x-15x=15-5
18x=10
x=10:18
x=⁵/₉
2]
2x+x/3< (3x-1)/2 /*6
12x+2x< 3(3x-1)
14x<9x-3
14x-9x<-3
5x<-3
x< - ⅗
x∈(-∞;-⅗)
3]
(2x-3)/(x+1)=9/7
iloczyn wyrazów skarajnych=iloczynowi wyrazów środkowych
9(x+1)=7(2x-3)
9x+9=14x-21
14x-9x=9+21
5x=30
x=30:5
x=6
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1]
(x-3)/2 +3x - x/5=2x-(x+1)/2 /*10
5(x-3)+30x-2x=20x-5(x+1)
5x-15+28x=20x-5x-5
33x-15x=15-5
18x=10
x=10:18
x=⁵/₉
2]
2x+x/3< (3x-1)/2 /*6
12x+2x< 3(3x-1)
14x<9x-3
14x-9x<-3
5x<-3
x< - ⅗
x∈(-∞;-⅗)
3]
(2x-3)/(x+1)=9/7
iloczyn wyrazów skarajnych=iloczynowi wyrazów środkowych
9(x+1)=7(2x-3)
9x+9=14x-21
14x-9x=9+21
5x=30
x=30:5
x=6