Question

Rozwiąż równania :

2(x-4)=3x+5

3(2x+3)=5(2x)-x

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

3(4x+7)-(5x-1)=x+5

Answer 1

a)

2(x-4)=3x+5

2x-8=3x+5

-x=13

x=-13

 

b)

3(2x+3)=5(2x)-x

6x+9=10x-x

-3x=-9

x=3

 

c)

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

3x+3-2x+2=1/4

x=1/4-5

x=-4 i 3/4

 

d)

3(4x+7)-(5x-1)=x+5

12x+21-5x+1=x+5

7x+22=x+5

6x=-17

x=-17/6

x=-2 i 5/6