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x=2
b . 9x - 1 = 17
9x=17+1 (przy przenoszeniu przenosisz liczbę z minusem i zmieniasz go na znak przeciwny, czyli dodawanie)
9x=18
x=2
c . x - 4 = 8
x=8+4
x=12
d . 2x + 3 = 9
2x=9-3
2x=6 //:2
x=3
e . 0,8x = 1,6//0,8
x=2
f . x + 5 = 10
x=10-5
x=5
g . 3x - 4 = 20
3x=20+4
3x=24 //:3
x=8
h . x - 3,6 = 1,2
x=1,2+3,6
x=4,8
i . 14x - 8x - 2 = 10
6x-2=10
6x=10+2
6x=12 //:6
x=2
j . 3a + 4a + 1 = 29
7a+1=29
7a=29-1
7a=28
a=4
k . 8b + 4b - 8 = 40
12b-8=40
12b=40+8
12b=48 //:12
b=4
l . x - 5x + 4 = 18
-4x=18-4
-4x=14 //: (-4)
x=-3,5
x = 2
b . 9x - 1 = 17
9x = 18 /:9
x = 2
c . x - 4 = 8
x = 12
d . 2x + 3 = 9
2x = 6
x = 3
e . 0,8x = 1,6
x = 2
f . x + 5 = 10
x = 5
g . 3x - 4 = 20
3x = 24
x = 8
h . x - 3,6 = 1,2
x = 4,8
i . 14x - 8x - 2 = 10
6x = 12
x = 2
j . 3a + 4a + 1 = 29
7a = 28
a = 4
k . 8b + 4b - 8 = 40
12b = 48
b = 4
l . x - 5x + 4 = 18
-4x = 14
x = -3,5
x=16/:8
x=2
b . 9x - 1 = 17
9x=17+1
9x=18/:9
x=2
c . x - 4 = 8
x=8+4
x=12
d . 2x + 3 = 9
2x=9-3
2x=6/:2
x=3
e . 0,8x = 1,6/:0,8
x=2
f . x + 5 = 10
x=10-5
x=5
g . 3x - 4 = 20
3x=20+4
3x=24/:3
x=8
h . x - 3,6 = 1,2
x=1,2+3,6
x=4,8
i . 14x - 8x - 2 = 10
14x-8x=10+2
6x=12/:6
x=2
j . 3a + 4a + 1 = 29
3a+4a=29-1
7a=28/:7
a=4
k . 8b + 4b - 8 = 40
8b+4b=40+8
12b=48/:12
b=4
l . x - 5x + 4 = 18
x-5x=18-4
-4x=14:(-4)
x=-3,5