Odpowiedź:
zad.1
a)
6x=3 |:6
x = 3/6
x = 1/2
b)
-3x=7 |:(-3)
x = -7/3
x = -2 i 1/3
c)
2x = 1/5 |*5
10x = 1 |:10
x = 1/10
d)
1,2x = 4,8 |:1,2
x = 4
e)
1/3x=3 |*3
x = 9
f)
-3/5x = -5 |*(-5)
3x = 25 |:3
x = 8 i 1/3
g)
3/4x = -4/9 |*36
27x = -16 |:27
x = -16/27
h)
0,1x=-7 |:0,1
x = -70
Zad. 2
10x+4=7 |-4
10x = 3 |:10
x = 3/10
4x-3=9 |+3
4x = 12 |:4
x = 3
-2x+2=-7 |-2
-2x = -9 |:(-2)
x = 9/2
x = 4 i 1/2
6x+5=4x
6x - 4x = -5
2x = -5 |:2
x = -2,5
9x - 3 = 2x + 5
9x - 2x = 5+3
7x = 8 |:7
x = 8/7
x = 1 i 1/7
-3x+4 = -5x-1
-3x + 5x = -1 - 4
Szczegółowe wyjaśnienie:
Odpowiedź w załączniku
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Odpowiedź:
zad.1
a)
6x=3 |:6
x = 3/6
x = 1/2
b)
-3x=7 |:(-3)
x = -7/3
x = -2 i 1/3
c)
2x = 1/5 |*5
10x = 1 |:10
x = 1/10
d)
1,2x = 4,8 |:1,2
x = 4
e)
1/3x=3 |*3
x = 9
f)
-3/5x = -5 |*(-5)
3x = 25 |:3
x = 8 i 1/3
g)
3/4x = -4/9 |*36
27x = -16 |:27
x = -16/27
h)
0,1x=-7 |:0,1
x = -70
Zad. 2
a)
10x+4=7 |-4
10x = 3 |:10
x = 3/10
b)
4x-3=9 |+3
4x = 12 |:4
x = 3
c)
-2x+2=-7 |-2
-2x = -9 |:(-2)
x = 9/2
x = 4 i 1/2
d)
6x+5=4x
6x - 4x = -5
2x = -5 |:2
x = -2,5
e)
9x - 3 = 2x + 5
9x - 2x = 5+3
7x = 8 |:7
x = 8/7
x = 1 i 1/7
f)
-3x+4 = -5x-1
-3x + 5x = -1 - 4
2x = -5 |:2
x = -2,5
Szczegółowe wyjaśnienie:
Odpowiedź w załączniku