" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
( - 0,5 x + 1 ) + 3x : 2 = 3
-0,5x+1+3x/2=3/*2
-x+2+3x=6
-2x=6-2
-2x=4/:(-2)
x=-2
e )
- 3 ( y/3 + 1 ) - 2 = 4 ( 1 - y )
-3 y/3 - 3-2=4-4y /*3
-9y-9-6=12-12y
-9y+12y=12+15
3y=27/:3
y=9
f )
0,5 ( 2 - 4x ) = 3 - x
1-2x=3-x
-2x+x=3-1
-x=2/:(-1)
x=-2
zad . 8
a )
12y - ( y + 5 ) = 10y - 1
12y-y-5=10y-1
11y-5=10y-1
11y-10y=-1+5
y=4
b )
2 ( u - 5 ) + 15 = 3 ( u - 4 ) + 10
2u-10+15=3u-12+10
2u+5=3u-2
2u-3u=-2-5
-u=-7/:(-1)
u=7
c )
- 3 ( y/3 + 1 ) - 2 = 4 ( 1 - y )
-3y y/3 -3-2=4-4y
y/3-6=4-4y+3y / *3
y-18=12-12y+9y
y+3y=12+18
4y=20/:4
y=5
d )
2 ( 3a - 2 ) - 6 = 4,5 ( 2a - 1 )
6a-4-6=9a-4,5
6a-9a=-4,5+4+6
-3a=5,5/:(-3)
a=