Odpowiedź:
a) 3x + 7 = 2x + 1
3x - 2x = 1 - 7
1x = -6
b) x = 8 - 3x
x + 3x = 8
4x = 8
c) 2x - 4 = 4x - 2
2x - 4x = -2 + 4
-2x = 2
d) 7 - 2x = 5x +28
-2x - 5x = 28 -7
- 7x = 21
e) 8x - 5 = 9x - 5
8x - 9x = -5 + 5
-1x = 0
f) 6x + 2x - 10 = 3x + 5
8x - 3x = 5 + 10
5x = 5
g) x + 2x + 3x = 5 + 6 + 7
6x = 18
h) 4x - 1 + 5x = 6x + 1 - 7x
9x - 1 = -1x + 1
9x + 1x = 1 + 1
10x = 2
i) 0 = 4x - 4 + 5x - 5
0 = 9x -9
0 + 9 = 9x
9 = 9x
a. 3x+7=2x+1
x=-6
b. x=8-3x
4x=8 /:4
x=2
c. 2x-4=4x-2
-2x=2 /:(-2)
x=-1
d. 7-2x=5x+28
-7x=21 /:(-7)
x=-3
e. 8x-5=9x-5
-x=0
x=0
f. 6x+2x-10=3x+5
5x=15 /:5
x=3
g. x+2x+3x=5+6+7
6x=18 /:6
h. 4x-1+5x=6x+1-7x
10x=2 /:10
x=2/10=1/5
i. 0=4x-4+5x-5
-9x=-9 /:(-9)
x=1
