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1/3x=-4 /:1/3
x= -12
b)3 całosci 2/3=1/2x-1/3
3=1/2x / 1/2
x=6
c)1/2x+5=x+8
1/2x-x=8-5
-1/2x=3 /(-1/2)
x=-6
zad 2
a)4(x+12)-3=9x-25
4x+48-3=9x-25
-5x=-70 / (-5)
x=14
b)x-4=2(2/5x+1)
x-4=4/5+2
x=4/5+6
x=6cał. i 4/5
c)6- (15- x ) =5 - ( 1 - 1/2x)
6-15+x=5+1+1/2x
-1/2x=15 /: -(1/2)
x=-30
d)4 (x +1 ) = 5 (x - 4 )
4x+4=5x-20
-x=-24 / *(-1)
x=24
e) 5 (4x - 2 ) = 19 całości 2/3x -6
20x-10=19 cał. 2/3x -6
1/3x=4 /: 1/3
x=12