Question

1. 2x/3 = 4/7 /-kreska ulamkowa
2. x-2/2 = x+3/3
3. 3,2/x = 2/2,1
4. 2x-1.4 = 3x +1/5
5. 3x/5 = 2/3
6. 2,4/x = 3/3,1

Answer 1

1. 2x/3 = 4/7 /-kreska ulamkowa/*21
14x= 12/:14
x= 12/14= 6/7
2. x-2/2 = x+3/3/*6
3(x-2)= 2(x+3)
3x-6=2x+6
x=12
3. 3,2/x = 2/2,1
3,2*2,1=2x
6,72=2x/:2
3,36=x
4. 2x-1.4 = 3x +1/5
2x-3x=1,5+1,4
x= 2,9
5. 3x/5 = 2/3/*15
9x= 10/:9
x= 10/9
6. 2,4/x = 3/3,1
2,4*3,1= 3x
7,44=3x/:3
x=2,48

Answer 2

2x/3 = 4/7 / razy 21
14x=12/:14
x=6/7


2. x-2/2 = x+3/3/*6
3x-6=2x+6
3x-2x=6+6
x=12


3,2/x = 2/2,1/*2,1x
2,1*3,2=2x
6,72=2x/:2
x=3,36

4. 2x-1.4 = 3x +1/5
2x-7/5=3x+1/5 / *5
10x-7=15x+1
10x-15x=1+7
-5x=8 /: (-5)
x=-8/5

5. 3x/5 = 2/3 / *15
9x=10/:9
x=10/9

6. 2,4/x = 3/3,1 /*3,1x
3,1*2,4=3x
7,44=3x /:3
x=2,48