oblicz:
a) -8+8x-1=-5-6x+5x ?
b) 5*4x=2(7x-2) ?
c)9-5*3x=4(5-2x) ?
d)0,6(x-1)=4-4*0,2 ?
a)-8+8x-1=-5-6x+5x
-9+8x =-5-x /+9, +x
8x =4 /:4
2x =1 /:2
x =1/2
b) 5*4x=2(7x-2)
5*4x=14x-4
20x =14x-4 /-14x
6x =-4 /:6
x =-4/6
x =-2/3
c)9-5*3x=4(5-2x)
9-15x =20-8x /+8x, -9
-7x =11 /:(-7)
x = -11/7
d)0,6(x-1)=4-4*0,2
0,6x-0,6=4-0,8 /+0,6
0,6x = 3,8
6/10x =38/10 /:6/10
x = 38/6
a)
-9+8x=-5-1x
8x+1x=-5+9
9x=4 |: 9
x= 4/9
b) 20x= 14x-4
20x-14x=-4
6x=-4 |:6
x= - 4/6
x= - 2/3
c) 9-15x=20-8x
-15x+8x=20-9
-7x=11 |: (-7)
x= - 11/7
d) 0,6x-0,6= 4-0,8
0,6x=3,2+0,6
0,6x=3,8
3/5x=19/5 | : 3/5 ( zamien na ulamki zwykle 19/5= 3 i 4/5)
x= 19/5 * 5/3 (mnozysz)
x= 19/3
x= 6i 1/3
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a)-8+8x-1=-5-6x+5x
-9+8x =-5-x /+9, +x
8x =4 /:4
2x =1 /:2
x =1/2
b) 5*4x=2(7x-2)
5*4x=14x-4
20x =14x-4 /-14x
6x =-4 /:6
x =-4/6
x =-2/3
c)9-5*3x=4(5-2x)
9-15x =20-8x /+8x, -9
-7x =11 /:(-7)
x = -11/7
d)0,6(x-1)=4-4*0,2
0,6x-0,6=4-0,8 /+0,6
0,6x = 3,8
6/10x =38/10 /:6/10
x = 38/6
a)
-9+8x=-5-1x
8x+1x=-5+9
9x=4 |: 9
x= 4/9
b) 20x= 14x-4
20x-14x=-4
6x=-4 |:6
x= - 4/6
x= - 2/3
c) 9-15x=20-8x
-15x+8x=20-9
-7x=11 |: (-7)
x= - 11/7
d) 0,6x-0,6= 4-0,8
0,6x=3,2+0,6
0,6x=3,8
3/5x=19/5 | : 3/5 ( zamien na ulamki zwykle 19/5= 3 i 4/5)
x= 19/5 * 5/3 (mnozysz)
x= 19/3
x= 6i 1/3