rozwiąż równania:
a)12x+7=9x+10
b)8-2x=5x-5
c)2x-3+x=-3+3x
d)2x+12=30-3x
a) 12x+7=9x+10 | -7
12x = 9x + 3 |-9x
3x = 3 | : 3
x = 1
b) 8 - 2x = 5x -5 | +8
2x = 5x + 3 | -5x
- 3x = 3 |: 3
-x = 1
x = -1
c) 2x - 3 + x = 3 + 3x | + 3
2x + x = 3x + 6
3x = 3x + 6 ....... to dziwne...
d) 2x + 12 = 30 - x | - 12
2x = 18 - x | + x
3x = 18 | :3
x = 6
Rozwiązania
a)
12x-9x=-7+10
9x=3 /:9
x=3
b)
-2x-5x=-5+(-8)
-7x=-13 /:(-7)
x=13/7
c)
2x+x-3x=3+3
0x=6
równani nie do rozwiązania
d)
2x+3x=-13+30
5x=17 /5
x=17/5=3 i 2/5
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a) 12x+7=9x+10 | -7
12x = 9x + 3 |-9x
3x = 3 | : 3
x = 1
b) 8 - 2x = 5x -5 | +8
2x = 5x + 3 | -5x
- 3x = 3 |: 3
-x = 1
x = -1
c) 2x - 3 + x = 3 + 3x | + 3
2x + x = 3x + 6
3x = 3x + 6 ....... to dziwne...
d) 2x + 12 = 30 - x | - 12
2x = 18 - x | + x
3x = 18 | :3
x = 6
Rozwiązania
a)
12x-9x=-7+10
9x=3 /:9
x=3
b)
-2x-5x=-5+(-8)
-7x=-13 /:(-7)
x=13/7
c)
2x+x-3x=3+3
0x=6
równani nie do rozwiązania
d)
2x+3x=-13+30
5x=17 /5
x=17/5=3 i 2/5