Proszę o sprawdzenia do równań:
1.
a) 2x-(1-4x) = 2 + (8x-5).
b) 4 - 2(5 -x) =x- 4(x- 1)
c) 7 - (3x + 4) = (x + 1) - (2x + 4)
d) x + 3 - (4 -x) = 3x - (2x- 3)
2.
a) x/3 - 5/6 = 1/12 - x/2
b) 7/9 + x/2 = 3/2 - x/18
c) x/2 - 3/4 = 7/8 + x/4
d) x/9 + 1/2 = 5/4 - x/6 + 1/12
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3.
a) 2x-7-[3-2x-2(1-2x0]=x-11
b) 10-[2(1-x)-3(2x+5)]=2(x+5)+1
c) 8-3x-2[4-(x+5)]=3(x+1)-1
d) 1-2x-3[2x-(-5+x)]=x+4
4.
a) 0,7x - 3 + 1,1x= -2,1x+ 0,6
b) -0,4 + 2x -2,1x =0,3x - 0,8
c) 0,11x - 0,08 + 0,4x = -o,o1x +0,2
d) 0,06x - 1 +0,4x = 0,27 - 0,04x
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Chciałeś sprawdzenie, to masz.
1.
a) 2x-(1-4x) = 2 + (8x-5)
x=1
b) 4 - 2(5 -x) =x- 4(x- 1)
x=2
c) 7 - (3x + 4) = (x + 1) - (2x + 4)
x=3
d) x + 3 - (4 -x) = 3x - (2x- 3)
x=4
2.
a) x/3 - 5/6 = 1/12 - x/2
x=1,1
b) 7/9 + x/2 = 3/2 - x/18
x=1,3
c) x/2 - 3/4 = 7/8 + x/4
x=6,5
d) x/9 + 1/2 = 5/4 - x/6 + 1/12
x=3
3.
a) 2x-7-[3-2x-2(1-2x)]=x-11
x=3
b) 10-[2(1-x)-3(2x+5)]=2(x+5)+1
x=-2
c) 8-3x-2[4-(x+5)]=3(x+1)-1
x=2
d) 1-2x-3[2x-(-5+x)]=x+4
x=-3
1
a) 2x-1+4x = 2 +8x-5
6x-8x = -3+1
-2x = -2/(-2)
x = 1
Spr. 2*1-1+4*1 = 2+8*1-5
2-1+4 = 2+8-5
5 = 5
L=P
b) 4-10+2x= x-4x+4
2x +3x = 4 + 6
5x = 10 /5
x = 2
spr. 4-10+4 = 2 -8+4
-2 = -2
L = P
c) 7 -3x-4 = x+1-2x-4
-3x +x = -3 -3
- 2x = -6/(-2)
x = 3
Spr. 7 - 3*3-4 = 3+1-2*3-4
7 -9 - 4 = 4 -6 - 4
- 6 = - 6
L = P
d) x+3-4+x= 3x-2x+3
2x -x = 3 +1
x = 4
Spr. 4 +3 -4+ 4 = 3*4-2*4 +3
7 = 12 - 8 +3
7 = 7
L = P
2.
a) x/3-5/6= 1/12-x/2 /*12
4x -10 = 1 -6x
4x +6 x = 1 +10
10 x = 11/10
x = 11/10
x = 1 i1/10
b) 7/9 + x/2 = 3/2 -x/18 /*18
14 + 9x = 27 -x
9x + x = 27 - 14
10 x = 13 /10
x = 1 i 3/10
c) x/2 -3/4 = 7/8 + x/4 /*8
4x -6 = 7 +2x
4x - 2x = 7 +6
2 x = 13 /2
x = 6 i 1/2
d) x/9 +1/2 = 5/4 -x/6 +1/12 /*36
4x +18 = 45 -6x +3
4x + 6x = 45 + 3 - 18
10 x = 30 /10
x = 3
3.
a) 2x-7-[3-2x-2(1-2x)] = x-11
2x-7-3+2x+2-4x= x-11
2x+2x-4x-x= -11 +7+3-2
-x = -3/*(-1)
x = 3
b) 10-[2(1-x)-3(2x+5)] = 2(x+5)+1
10-[2-2x-6x-15] = 2x+10 +1
10-2+2x+6x+15= 2x + 11
2x +6x -2x = 11-10+2-15
6 x = -12 /6
x = -2
c) 8-3x-2[4-(x+5)]= 3(x+1)-1
8-3x-2[4-x-5]= 3x+3-1
8-3x-8+2x+10 = 3x+3-1
-3x+2x-3x = 3-1-8+8-10
- 4x = -8/-4
x = 2
d) 1-2x-3[2x-(-5+x)]= x+4
1 - 2x -3[2x+5-x]= x+4
1-2x -6x -15+3x= x+4
-2x-6x+3x -x = 4 -1+15
-6x = 18/-6
x = - 3
4.
a) 0,7x -3 +1,1x = -2,1 x + 0,6
0,7x +1,1x +2,1x = 0,6 + 3
3,9 x = 3,6 /3,9
x = 0,92
b) -0,4 +2x -2,1x = 0,3 x -0,8
2x -2,1 x -0,3 x = -0,8 +0,4
-0,4 x = -0,4/-0,4
x = 1
c) 0,11 x -0,08 +0,4 x = -0,01 x +0,2
0,11 x +0,4 x + 0,01 x = 0,2 +0,08
0,52 x = 0,28 /0,52
x = 0,54
d) 0,06 x -1 +0,4 x = 0,27 -0,04 x
0,06 x + 0,4 x + 0,04 x = 0,27 + 1
0,5 x = 1,27 /0,5
x = 2,54