Question

rozwiąż obliczenia

a)4x-(-2x+3)=3(x-1)

b)-(-5x+3)-2x=4(2x+1+3

c)2(3x-1)-5x=3x-4-2

Answer 1

a) 4x-(-2x+3)=3(x-1)

4x+2x-3=3x-3

6x-3-3x+3=0

3x=0  /:3

x=0

 

b) -(-5x+3)-2x=4(2x+1+3)

5x-3-2x=8x+4+12

3x-3=8x+16

3x-8x=16+3

-5x=19  /:(-5)

x=-19/5 w ułamku

c) 2(3x-1)-5x=3x-4-2

6x-2-5x=3x-6

x-2=3x-6

x-3x=-6+2

-2x=-4  /:(-2)

x=2

Answer 2

a) 4x -(-2x+3) = 3(x-1)

4x+2x-3 = 3x-3

6x -3 = 3x-3   // - 3x

3x - 3 = -3     // +3

3x = 0           // :3

x = 0

 

b) -(-5x+3)-2x=4(2x+1+3

5x-3-2x = 8x+4+12

3x-3 = 8x+16   

-3-16 = 8x-3x

-19 = 5x  // :5

x = -19/5

x = 3,8

 

c) 2(3x-1)-5x=3x-4-2

6x-2-5x = 3x-6

x-2 = 3x-6   //-x

-2 = 2x -6   //+6

4 = 2x        //:2

x = 2

 

P.S. taki znak "/" to ułamek.

 

Pozdrawiam ;D

by Oksaa

 

 

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