1) -3x = -21x = -21 / -3x = 7
2) 20x = -5x = -5 / 20x = -1/4
3) 8x + 5 = 08x = -5x = -5 / 8
4) 3x + 5 = 03x = -5x = -5 / 3
5) 3x - 7 = 23x = 2 + 73x = 9x = 9 / 3x = 3
6) 11 - 4x = 2x11 = 2x + 4x11 = 6xx = 11 / 6
Ответ:1) x = 72) x = -1/43) x = -5/84) x = -5/35) x = 36) x = 11/6
1) -3x = -21
x = -21 / -3
x = 7
2) 20x = -5
x = -5 / 20
x = -1/4
3) 8x + 5 = 0
8x = -5
x = -5 / 8
4) 3x + 5 = 0
3x = -5
x = -5 / 3
5) 3x - 7 = 2
3x = 2 + 7
3x = 9
x = 9 / 3
x = 3
6) 11 - 4x = 2x
11 = 2x + 4x
11 = 6x
x = 11 / 6
Ответ:
1) x = 7
2) x = -1/4
3) x = -5/8
4) x = -5/3
5) x = 3
6) x = 11/6