2x
2x plus 5x simplified is 7x.
2x + 4x + 3 = 6x + 3
6x + 9 + 2x = 8x + 9
5x - 8a + 4a - 2x + a = 3x - 3a
x - 2x + 3 = 3 - x
3x + 7y
Simplify 4x + 3 = 2x + 8 2x = 5 x =2½
6x-2y
x(x + 2)
You can factor it, if you consider that simpler.
6x plus 4y