2x+5=19
2×=14
x=7
3x-9=15
3x=24
x=8
-3x+9=6
-3x=-3
x=1
-x+12-2x=-6
-3x+12=-6
-3x=-18
x=6
-17x-11=23
-17x=34
x= -2
5y+2+2y=-4-9y
7y+2=-4-9y
7y+9y=-4-2
16y=-6
[tex] y = - \frac{6}{16} = - \frac{3}{8} [/tex]
-9(+4x-2)=-18
-36x+18=-18
-36x=-36
x=1
-5(-6+7x)=65
30-35x=65
-35x=35
x= -1
-9x-7+7x-3(2x+1)=-2
-9x-7+7x-6x-3=-2
-8x-10=-2
-8x=8
x= -1
coroana?
