ecuaciones de primer grado.

- 3X = 9

6X - 4 = 2X

4X + 1 = 2X - 7

7Y -9 = 12

-2X + 1 = -5X -2

5X / 2 = 10

X - 1 = 4

2( X + 2 ) = -8

X = - 3

X = 1

X = 5

X = -4

X = -6

X = -1

X = 3

X = 4