а) -2х + 7х = -105x = -10x = -2
б) -3y + (4y - 2) = 0y - 2 = 0y = 2
в) (x + 6) + 3(x + 2) = 0x + 6 + 3x + 6 = 04x + 12 = 04x = -12x = -3
г) 2(y - 9) - 5(y - 3.6) = 272y - 18 - 5y + 18 = 27-3y = 27y = -9
а) -2х + 7х = -10
5x = -10
x = -2
б) -3y + (4y - 2) = 0
y - 2 = 0
y = 2
в) (x + 6) + 3(x + 2) = 0
x + 6 + 3x + 6 = 0
4x + 12 = 0
4x = -12
x = -3
г) 2(y - 9) - 5(y - 3.6) = 27
2y - 18 - 5y + 18 = 27
-3y = 27
y = -9