Решите 14 уравнений ДАМ 150 БАЛЛОВ!!!!
1) 6x = 18
x = 18:6
x = 3
Ответ: x = 3
2) -3x = 21
x = 21 : (-3)
x = -7
Ответ: x = -7
3) 7x = -56
x = -56 : 7
x = -8
Ответ: x = -8
4) 5x - 3 = 12
5x = 12 + 3
5x = 15
x = 15 : 5
5) -4x + 1 = 13
-4x = 13 - 1
-4x = 12
x = 12 : (-4)
x = -3
Ответ: x = -3
6) -x + 9 = 16
-x = 16 - 9
-x = 7
7) 6x - 14 = 1+3x
6x -3x = 1 + 14
3x = 15
x = 15:3
x = 5
Ответ: x = 5
8) 7x + 17 = x - 1
7x - x = -1 - 17
6x = -18
x = (-18) : 6
9) -8x + 3 = -x + 24
-8x + x = 24 - 3
-7x = 21
x = 21 : (-7)
10) 5 (x - 2) - 4 = 6x + 7
5x - 10 - 4 = 6x + 7
5x - 14 = 6x + 7
5x - 6x = 7 + 14
-x = - 21
Ответ: x = -21
