Ответ:
1. x = -4
2. y = 1
3. x = -2
Пошаговое объяснение:
1. 7(x + 2) = -14
7x + 14 = -14
7x = -28
x = -4
2. 8y = 2(5 - y)
8y = 10 - 2y
10y = 10
y = 1
3. 2(3x - 4) = 4(x - 3)
6x - 8 = 4x - 12
2x = -4
x = -2
7(х + 2) = -14
7х + 14 = -14
7х = -14 - 14
7х = -28
х = -28 : 7
х = -4
8у = 2(5 - у)
8у = 10 - 2у
8у + 2у = 10
10у = 10
у = 10 : 10
у = 1
2(3х - 4) = 4(х - 3)
6х - 8 = 4х - 12
6х - 4х = -12 + 8
2х = -4
х = -4 : 2
х = -2
7(х + 3) - 2(х - 5) = 8
7х + 21 - 2х + 10 = 8
5х + 31 = 8
5х = 8 - 31
5х = -23
х = -23 : 5
х = -4,6
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Answers & Comments
Ответ:
1. x = -4
2. y = 1
3. x = -2
Пошаговое объяснение:
1. 7(x + 2) = -14
7x + 14 = -14
7x = -28
x = -4
2. 8y = 2(5 - y)
8y = 10 - 2y
10y = 10
y = 1
3. 2(3x - 4) = 4(x - 3)
6x - 8 = 4x - 12
2x = -4
x = -2
Пошаговое объяснение:
7(х + 2) = -14
7х + 14 = -14
7х = -14 - 14
7х = -28
х = -28 : 7
х = -4
8у = 2(5 - у)
8у = 10 - 2у
8у + 2у = 10
10у = 10
у = 10 : 10
у = 1
2(3х - 4) = 4(х - 3)
6х - 8 = 4х - 12
6х - 4х = -12 + 8
2х = -4
х = -4 : 2
х = -2
7(х + 3) - 2(х - 5) = 8
7х + 21 - 2х + 10 = 8
5х + 31 = 8
5х = 8 - 31
5х = -23
х = -23 : 5
х = -4,6