Пошаговое объяснение:
1) 7(x + 2) = -14
7x + 14 = -14
7x = -14 - 14
7x = -28
x = -28:7
x = -4
2) 8y = 2(5- у)
8y = 10 - 2y
8y + 2y = 10
10y = 10
y = 10:10
y = 1
3) 2(3x – 4) = 4(x - 3)
6x - 8 = 4x - 12
6x - 4x = -12 + 8
2x = -4
x = -4:2
x = -2
Пошаговое объяснение:
1) 7(x + 2) = -14
7x + 14 = -14
7x = -14 - 14
7x = -28
x = -28:7
x = -4
2) 8y = 2(5- у)
8y = 10 - 2y
8y + 2y = 10
10y = 10
y = 10:10
y = 1
3) 2(3x – 4) = 4(x - 3)
6x - 8 = 4x - 12
6x - 4x = -12 + 8
2x = -4
x = -4:2
x = -2