Question

Kto pomoze !!!!!!!
zadanie 9 i 11 strona 177 podręcznik z matematyki dla gimnazjum(matematyka 1)

z góry dziękuję!. ;D

Answer 1

9.
a> 1/3x -2 = x +2 /x3 b> 1- 6/7x = 4/7 /x7
x-6 = 3x + 6 7 - 6x = 4
x-3x = 12 7-4 = 6x
-2x = 12 / :-2 3 = 6x /:3
x = -6 x = 1/2

c> 6(1/4x -2) = 18 d> x/6 - 1/6 = 1 /x6
6/4x -12 = 18 /x4 x - 1 = 6
6x - 48 = 72 x = 7
6x = 120
x = 20

e> -2 (2x -1 )= x/3 /x3 f> 2/5 (3-x) = -2 /x5
- 6 ( 2x - 1 ) = x 2 (3 -x) = -10
-12x +6 = x 6 -2x = -10
-13x = -6 /:-13 -2x = -16 /:-2
x = 6/13 x = 8

g> 3/4 ( 2-3x ) = -6 /x4 h> 1/5 (x-3) = 9 - x /x5
3 (2-3x) = -24 1 (x-3) = 45 -5x
6 - 9x = -24 x -3 = 45 - 5x
-9x = -30 /:-9 6x = 48 /:6
x = 3 i 1/3 x = 8

i> (0,6 + x):2 = x +1
0,3 + 1/2x = x +1 /x2
0,6 + x = 2x + 2
-x = 1,4 /:-1
x = -1,4

SORKI ŻE TYLKO ZADANIE 9 ALE ZAD.11 JEST TEZ DŁUGIE I ZROBIĘ ODDZIELNIE :>

Answer 2

Zad9
a) 1/3 - 2=x+2 |Razy 3
1-6=3x+6 |-6
1-6-6+3x
-11=3x | /3
x=-11/3
b) 1-6/7x=4/7 | razy 7
1-6x=4 |-1
6x= 4-1
6x=3 |/6
x =0,5
c) 6(1/4x - 2)=18
3/2x-12=18 |razy2
3x -24=36 | +24
3x=36+24
3x=60 |/3
x=20
d) x/6-1/6=1 |razy6
x-1=6 |+1
x=6+1
x=7
e) -2(2x-1)=x/3 |razy3
-6(2x-1)=x
-12x+6=X |+12x
6=x+12x
6=13x|/13
x=6/13
f) 2/5(3-x)=-2 |razy5
2(3-x)=-10
6-2x=-10|-6
-2x=-10-6
-2x=-16|/-2
x=8
g)3/4(2-3x)=-6 |razy4
3(2-3x)=-24
6-9x=-24
-9x=-24-6
-9x=-30|/-9
x=30/9
h)1/5(x-3=9-x|razy5
x-3=45-5x
x+5x=45+3
6x=48 |/6
x=8
i)0,6+x/2=x+1|razy2
0,6+x=2x+2
x-2x=2-0,6
-x=1,4 |/-1
x=-1,4
zad11
a) x/3+1=5/6+x/2|razy6
2x+6=5+3x
2x-3x=5-6
-x=-1 |/-1
x=1
b)2x-3/4=1/2+x |razy4
2x-3=2+4x
2x-4x=2+3
-2x=5
x=-5/2
c)x+2/9+x-1/3=1|razy9
x+2+3x-3=9
4x=9+3-2
4x=10|/4
x=10/4
d)2x+3/5=2-x/3+x|razy15
6x+9=10-5x+15x
6x-10x=10-9
-4x=1|/-4
x=-1/4
e)3x-5/-5x-1/10=0 |razy10
15x-25-5x+1=0
15x-5x=-1+25
10x=24|/10
x=24/10
f)x/2=2/5(4-x)-4|razy10
5x=4(4-x)-40
5x=16-4x-40
5x+4x=-40+16
9x=-24|/9
x=-24/9
g)2x-1/5-x-2/2=0,7x |razy10
4x-2-5x+10=7x
4x-5x-7x=-10+2
-8x=-8|/-8
x=1
h)2x-(3x+5)/4=-1/4x-1 |razy4
8x-3x-5=-x-4
8x-3x+x=-4+5
6x=1 |/6
x=1/6