Odpowiedź:
zad.3
3x+7=21
3x = 21 - 7 /:3
x = 14/3 = 4 2/3
5x-1=19
5x = 19 + 1 /:5
x = 20/5 = 4
-3x-3=-15
-3x = -15 + 3 /:(-3)
x = 12/3 = 4
-4x+2=18
-4x = 18 - 2 /:(-4)
x = -16/4 = -4
3x-7=-1
3x = -1 + 7 /:3
x = 6/3 = 2
9-2x=23
-2x = 23 - 9 /:(-2)
x = -14/2 = -7
-2-4x=10
-4x = 10 + 2 /:(-4)
x = -12/4 = -3
-6-2x=12
-2x = 12 + 6 /:(-2)
x = -18/2 = -9
14+5x=-1
5x = -1 - 14 /:5
x = -15/5 = -3
8x+7=39
8x = 39 - 7 /:8
x = 32/8 = 4
Zad.4
5x-3-2x=15
3x = 15 + 3 /:3
x = 18/3 = 6
6x+1+x=15
7x = 15 - 1 /:7
x = 14/7 = 2
-4x-2+10x=10
6x = 10 + 2 /:6
x = 12/6 = 2
-x-4-x-1=-9
-2x = -9 + 5 /:(-2)
x = 4/2 = 2
4-2x-x=-14
-3x = -14 - 4 /:(-3)
x = 18/3 = 6
1-x-2+5x=7
4x = 7 + 1 /:4
x = 8/4 = 2
-8x-2+5x-9=4
-3x = 4 + 11 /:(-3)
x = -15/3 = -5
10x-4x+2=20
6x = 20 - 2 /:6
x = 18/6 = 3
4=-6x-2+4x
-2x = 4 + 2 /;(-2)
x = -6/2 = -3
-15=x-9+5x
6x = -15 + 9 /:6
x = -6/6 = -1
Szczegółowe wyjaśnienie:
Odpowiedź:
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zad.3
•3x+7=21
3x = 21 - 7 /:3
x = 14/3 = 4 2/3
•5x-1=19
5x = 19 + 1 /:5
x = 20/5 = 4
•-3x-3=-15
-3x = -15 + 3 /:(-3)
x = 12/3 = 4
•-4x+2=18
-4x = 18 - 2 /:(-4)
x = -16/4 = -4
•3x-7=-1
3x = -1 + 7 /:3
x = 6/3 = 2
•9-2x=23
-2x = 23 - 9 /:(-2)
x = -14/2 = -7
•-2-4x=10
-4x = 10 + 2 /:(-4)
x = -12/4 = -3
•-6-2x=12
-2x = 12 + 6 /:(-2)
x = -18/2 = -9
•14+5x=-1
5x = -1 - 14 /:5
x = -15/5 = -3
•8x+7=39
8x = 39 - 7 /:8
x = 32/8 = 4
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Zad.4
•5x-3-2x=15
3x = 15 + 3 /:3
x = 18/3 = 6
•6x+1+x=15
7x = 15 - 1 /:7
x = 14/7 = 2
•-4x-2+10x=10
6x = 10 + 2 /:6
x = 12/6 = 2
•-x-4-x-1=-9
-2x = -9 + 5 /:(-2)
x = 4/2 = 2
•4-2x-x=-14
-3x = -14 - 4 /:(-3)
x = 18/3 = 6
•1-x-2+5x=7
4x = 7 + 1 /:4
x = 8/4 = 2
•-8x-2+5x-9=4
-3x = 4 + 11 /:(-3)
x = -15/3 = -5
•10x-4x+2=20
6x = 20 - 2 /:6
x = 18/6 = 3
•4=-6x-2+4x
-2x = 4 + 2 /:(-2)
x = -6/2 = -3
•-15=x-9+5x
6x = -15 + 9 /:6
x = -6/6 = -1
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Szczegółowe wyjaśnienie:
Mam nadzieję że pomogłam :)
