1) -2. 5+3x=9x+0. 5
3x-9x=0. 5+2. 5
-6x=3
x=-0. 5
2) 2 (4x-9)+x=45
8x-18+x=45
9x=63
x=7
3) 3 (2.5x-5) =-1. 5x-3.3
7. 5x-15=-1. 5x-3.3
7. 5x+1.5x=-3. 3+15
9x=11. 7
x=1. 3
4)-3x+7=2x-13
-3x-2x=-13-7
-5x=-20
x=4
5)32x-9 =16+27x
32x-27x=16+9
5x=7
x=1. 4
6)7x-9=2x-24
7x-2x=-24+9
5x=-15
x=-3
7) 9x-19=x-(3x+8)
9x-19=-2x-8x
9x+2x+8x=19
19x=19
x =1
