rozwiażcie , obilczcie x . PILNEEE!!
a) 3x+5=2x+2
b) 5(x-3)=2(x+3)
c) 29x+27-8x=48+7x-105
d) x+2 /3 +1 =x
e) 2(4+3x)=5-3(x-2)
f) -2/3x+8=2
g) 2,1x + 18,4 = 5,7x -3,2
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a)3x+5=2x+2
3x-2x=2-5
x=-3
b)5(x-3)=2(x+3)
5x-15=2x+6
5x-2x=6+15
3x=21 /:3
x=7
c)29x+27-8x=48+7x-105
29x-8x-7x=48-105-27
14x=-84 /:14
x=6
d)x+2 /3+1=x /3
x+2+3=3x
x-3x=-3-2
-2x=-5 /:-2
x=5/2
x=2 1/2
e)2(4+3x)=5-3(x-2)
8+6x=5-3x+6
6x+3x=5+6-8
9x=6 /:9
x=6/9
x=2/3
f)-2/3x+8=2
-2/3x=2-8
-2/3x=-6 /:-2/3
x=-6/1:(-2/3)
x=6/1*3/2
x=9/1
x=9
g)2,1x+18,4=5,7x-3,2
2,1x-5,7x=-3,2-18,4
-3,6x=-21,6 /:(-3,6)
x=6
LICZĘ NA NAJ
a) 3x+5=2x+2
3x-2x=2-5
-x=-3
x=3
b)5(x-3)=2(x+3)
5x-15=2x+6
5x-2x=6+15
3x=21 | :3
x=7
c)29x+27-8x=48+7x-105
29x-8x-7x=48-105-27
29x-15x=-84
14x=-84 | :14
x-6
d) x+2 /3 +1 =x | *3
x+2+3=3x
x-3x=-2-3
-2x=-1 | :2
-x = -0,5
x= 0,5
e) 2(4+3x)=5-3(x-2)
8+6x= 5-3x-6
6x+3x=5-6-8
9x=-9 | :9
x=-1
f) -2/3x+8=2 | *3
-x+24=6
-x=6-24
-x=-18
x=18
g) 2,1x + 18,4 = 5,7x -3,2 | *10
21x+184=57x-32
21x-57x=-32-184
-46x=-152 | :46
-x = 152/46
-x = 3 i 14/48
-x = 2 i 7/24
x= - 2 i 7/24
PROSZĘ O NAJ,
POZDRAWIAM ♥