3x+2x1=...dan 2x+1+3x=....5+2x-4=.....dan 2x-4-5.....tolong donk besok mau kumpul nih

1.)
3x+2x+1 =
5x = -1
x = -1/5

2.)
2x+1+3x =
5x = -1
x = -1/5

3.)
5+2x-4 =
2x = -5+4
2x = -1
x = -1/2

4.)
2x-4-5 =
2x = 4x+5x
2x = 9
x = 9/2