Odpowiedź :
A)2x+6=20 |-6
2y=14
y=7
B)23+9y=50 |-23
9y=27
y=3
c)8y-36=24 |+36
8y=60
y=7,5
d)7x-21=5x |-5x
2x=21
x=10,5
e)6y-13=-56 |+13
6y=-43
y=-7 i 1/43
f)4x-4=3 +4
4x=7
x=1,75
1)2x + 6 = 20
2x = 20 - 6
2x = 14|:2
x = 7
2)23 +9y = 50
9y = 50 - 23
9y = 27 |:9
y= 3
3)8y - 36 = 24
8y = 24+36
8y= 60| :8
y= 7, 4
2x = 20 - 6
2x = 14|:2
x = 7
2)23 +9y = 50
9y = 50 - 23
9y = 27 |:9
y= 3
3)8y - 36 = 24
8y = 24+36
8y= 60| :8
y= 7, 4
2x+6=20
2x=20-6
2x=14
x=14/2
x=7
23+9y=50
9y=50-23
9y=27
y=27/9
y=3
8y-36=24
8y=24+36
8y=60
y=7,5
7x-21=5x
7x-5x=21
2x=21
x=21/2
x=10,5
6y-13=-56
6y=-56+13
6y=-43
y=-43/6
y=-7,11
4x-4=3
4x=3+4
4x=7
x=7/4
x=1,75
2x=20-6
2x=14
x=14/2
x=7
23+9y=50
9y=50-23
9y=27
y=27/9
y=3
8y-36=24
8y=24+36
8y=60
y=7,5
7x-21=5x
7x-5x=21
2x=21
x=21/2
x=10,5
6y-13=-56
6y=-56+13
6y=-43
y=-43/6
y=-7,11
4x-4=3
4x=3+4
4x=7
x=7/4
x=1,75