Question

Matematyka kl.1 gimnazjum z tematu Rozwiązywanie Równań

3 * (2x-4)=x+3

2/3 + x = 4/5

3/4 x = 2/5

- 1/2 x - 1 = -1/2

2x+3 2*x

------- = ------- + x

5 3

Answer 1

3 * (2x-4)=x+3

6x-12=x+3

5x=15

x=3

 

2/3 + x = 4/5

x=4/5-2/3

x=12/15-10/15

x=2/15

 

3/4 x = 2/5

x=2/5 : 3/4

x= 2/5 * 4/3

x=8/15

 

- 1/2 x - 1 = -1/2

-1/2x=1/2

x=-1

 

 

2x+3       2*x    

------- = ------- + x | *15

   5            3

6x+9=10x+15x

6x+9=25x

19x=9

x=9/19