Question

A) 2x-7-(3-2x-2(1-2x))=x-11

B) x-1 1/2-1/3x=2+1/4x-5/6

C) 5(3-x)+x-3kreska ulamkowa po spodem 2 =4x+5

PROSZE O SZYBKIE ROZWIAZANIE !!!

DAJE NAJ !!!!!! :)

Answer 1

A) 2x-7-(3-2x-2+4x)=x-11

2x-7-1-2x=x-11

-8=x-11

-x=-11+8

-x=-3 / *(-1)

x=3

 

C) 5(3-x)+x-3  kreska 2   = 4x+5

15-5x +x-3    kreska 2    = 4x+5

12-4x  kreska 2     = 4x+5    / *2

6-2x = 8x+10

-2x - 8x= 10 -6

-10x = 4  /* (-10)

x =  -0.4

 

B ) nierozumiem

 

 

 

Answer 2

2x-7-[3-2x-2[1-2x]]=x-11
2x-7-[3-2x-2+4x]=x-11
2x-7-3+2x+2-4x=x-11
2x+2x-4x-x= -11+7+3-2
-x= -3     /*[-1]
x=3

 

x-1 1/2-1/3x=2+1/4x-5/6
x-3/2-1/3x=2+1/4x-5/6     /*12
12x-18-4x=24+3x-10
12x-4x-3x=24-10+18
5x=32   /:5
x=32/5
x=6 2/5

 

 

5[3-x]+x-3/2=4x+5
15-5x+x-3/2=4x+5        /*2
30-10x+x-3=8x+10
-10x+x-8x=10-30+3
-17x= -17       /:-17
  x=1