Odpowiedź:
7+x=8−2x |+2x
7+ 3x = 8 | - 7
3x = 1
x= 1/3
3x−4=5x−12 | - 3x
- 4 = 2x - 12 | +12
2x = 8
x = 4
x−4=6x−15 | - x
-4 = 5x - 15 | +15
5x = 11 | :5
x = 2,2
5(x−5)=8(x−3)
5x - 25 = 8x - 24 | - 5x
- 25 = 3x - 24 | + 24
3x = -1 | :3
x = - 1/3
2(x−1)=5x−19
2x - 2 = 5x - 19 | - 2x
- 2 = 3 x - 19 | +19
3x = 17 | :3
x = 17/3 = 5 2/3
−2(x+5)=7x+2
-2x - 10 = 7x + 2 | + 2x
- 10 = 9 x + 2
9 x = - 12 |:9
x = - 4/3 = - 1 1/3
6x+1=7x+9 | - 6x
1 = x + 9 | - 9
x = - 8