Question

rozwiąż równanie 1. (3/4)X - (5X+13/8)=1/4+2X 2.(Y+1/2)-(2Y-3/3)=5/6 3.-4+(X/2)=-9 4. -6+(X/3)=-10 5. (4/5)=(X/3)

Answer 1

1. (3/4)x - (5x+ 13/8) = 1/4 +2x

     3/4x - 5x - 2x = 1/4 + 13/8

      - 6 i1/4x = 2/8+13/8

        - 25/4x = 15/8  /: (-25/4)

           x = 15/8 * (-4/25 )

           x = 3/2 * ( -1/5)

           x = -3/10

 

2.  (y + 1/2)-(2y -3/3) = 5/6

      y -2y = 5/6 -1/2 -1

      - y = 5/6 - 3/6 -1

      - y =  5/6 - 9/6

      -y =- 4/6 /: (-1)

         y = 4/6 =2/3

 

 

 

3. -4+(x/2) = -9  /*2

    -8 + x = -18

        x = -18 + 8

        x = - 10

 

4. -6+(x/3)= -10  /*3

     -18 + x = -30

      x = -30 + 18

      x = -12

 

5. 4/5 = (x/3) *3

     12/5 = x

       x = 12/5

       x = 2 i 2/5