1) 7x=35
x=35/7
x=5
-3,8x=1
x=1/(-19/5) (-3,8=3 8/10=3 4/5=19/5)
x=1*(5/19)=5/19
-x=-0,03
x=0,03
-12x=3,5
x=7/2*(-1/12) (3,5=3 5/10=3 1/2=7/2)
x=-7/24
2) 8x-5=x-40
8x-x=-40+5
7x=-35
x=-5
7x+22=x-14
7x-x=-14-22
6x=-36
x=-6
19-6x=0
-6x=-19
6x=19
x=19/6
x=3 1/6