Odpowiedź:
a) 3 · x + 5= 38
3x = 33
x=11
b) 7·x-10= -24
7x = -14
x = -2
a) 5·x-7-x=9-2·x-4
5x-x+2x=7 +9 -4
6x = 12
x=2
b) 1-2·x-12-7·x=3·x+10-5·x
-2x -7x -3x +5x= 10 -1 +12
-7x = 21
x = -3
Szczegółowe wyjaśnienie:
Odpowiedź:
a) 3 * x + 5 = 38
3 x + 5 = 38 | -5
3x = 33 | :3
x = 11
b) 7 * x - 10= -24
7x - 10 = -24 | +10
7x = -14 | :7
x = -2
c) 5 * x - 7 - x = 9 - 2 * x - 4
5x - 7 - x = 9 - 2x - 4
4x - 7 = 5 - 2x | +2x
6x - 7 = 5 | +7
6x = 12 | :6
x = 2
d) 1 - 2 * x - 12 - 7 * x = 3 * x + 10 - 5 * x
1 - 2x - 12 - 7x = 3x + 10 - 5x
-11 - 5x = - 2x + 10 | +2x
-11 - 3x = 10 | +11
- 3x = 21 | (-3)
x = -7