9-2х=4х-19 4(х-3)=х+5 7,6+4х=6(у-1,6) -3(2у+3)-14=16 9-2х=9х-х 6+2х+2х-3 3х+9=3(х+3) Решите уравнения

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1) 9-2x = 4x - 19
9 + 19 = 4x + 2x
28 = 6x
x = 28/6
x = 14/3

2) 4(x - 3) = x + 5
4x - 12 = x + 5
4x - x = 5 + 12
3x = 17
x = 17/3

3) 7.6 + 4x = 6(y - 1.6)
7.6 + 4x = 6y - 9.6
4x + 17.2 = 6y
x + 4.3 = 6y

4) -3(2y + 3) - 14 = 16
-6y - 9 - 14 = 16
-6y - 23 = 16
-6y = 39
y = -39/6
y = -6.5

5) 9 - 2x = 9x - x
9 - 2x = 8x
9 = 8x + 2x
9 = 10x
x = 9/10

6) 6 + 2x + 2x - 3 = 0
6 + 4x - 3 = 0
4x + 3 = 0
4x = -3
x = -3/4

7) 3x + 9 = 3(x + 3)
3x + 9 = 3x + 9
3x = 3x
x can be any real number