Question

rozwiąż rownania:
a) 1/3x - 2 = x + 2
b) 1 - 6/7x = 4/7
c) 6 (1/4x - 2) = 18
d) 3/4 (2-3x) = -6
e) 1/5 (x-3) = 9 -x
f) 0,6 + x nad 2 = x+1

Plz o szybką odp ;* naj bd.

Answer 1

 

a) 1/3x-2=x+2/*3
x-6=3x+6
-2x=12 /-2
x=-6

b) 1-6/7x=4/7
-6/7x=4/7-1
-6/7x=-3/7 /*(-7/6)
x= 21/42
x=1/2

c) 6 (1/4x - 2)=18
6/4x-12=18
3/2x=18+12
3/2x =30 /*2/3
x=60/3
x=20

d) 3/4 ( 2 - 3x ) = -6 /*4
3(2-3x)=-24
6-9x=-24
-9x=-30 /-9
x=3 1/3

e) 1/5 (x-3) = 9 - x
1/5x -3/5 = 9-x
1/5 x +x = 9+3/5
1 i 1/5x = 9 i 3/5
6/5 x = 48/5 /*5/6
x =8

f) 0,6 + x / 2 = x + 1 
1/2 x -x = 1-0,6
-1/2 x = 0,4 *(-2)
x = -0,8