Ответ:
Пошаговое объяснение:
1) 3х + 45 = 2х + 15
3х - 2х = 15 - 45
х = -30
2) – 8х = - 8
х = -8 : (-8)
х = 1
3) 2х – 3 = 5
2х = 5 + 3
2х = 8
х = 8 : 2
х = 4
4) 3х + 1 = х + 3
3х - х = 3 - 1
2х = 2
х = 2 : 2
5) 3х = - 18
х = -18 : 3
х = -6
6) 5х + 4 = х – 12
5х - х = -12 - 4
4х = -16
х = -16 : 4
х = -4
7) 7х + 3 = 3х + 11
7х - 3х = 11 - 3
4х = 8
х = 8 : 4
х = 2
8) – 7х = 21
х = 21 : (-7)
х = -3
9) 3х – 8 = 2х – 1
3х - 2х = 8 - 1
х = 7
10) 32х = - 16
х = -16 : 32
х = -0,5
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Answers & Comments
Ответ:
Пошаговое объяснение:
1) 3х + 45 = 2х + 15
3х - 2х = 15 - 45
х = -30
2) – 8х = - 8
х = -8 : (-8)
х = 1
3) 2х – 3 = 5
2х = 5 + 3
2х = 8
х = 8 : 2
х = 4
4) 3х + 1 = х + 3
3х - х = 3 - 1
2х = 2
х = 2 : 2
х = 1
5) 3х = - 18
х = -18 : 3
х = -6
6) 5х + 4 = х – 12
5х - х = -12 - 4
4х = -16
х = -16 : 4
х = -4
7) 7х + 3 = 3х + 11
7х - 3х = 11 - 3
4х = 8
х = 8 : 4
х = 2
8) – 7х = 21
х = 21 : (-7)
х = -3
9) 3х – 8 = 2х – 1
3х - 2х = 8 - 1
х = 7
10) 32х = - 16
х = -16 : 32
х = -0,5