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3-3x+8=2x+9
-3x-2x+11=9
-5x=9-11
5x=-9-11
5x=-2
x=-2/5
x=-0,4
Ejercicio 2:
2y-5y-3=2y+12
-3y-3=2y+12
-3y-2y=12+3
5y=-12+3
5y=-9
y=-9/5
y=-1.8
Ejercicio 3:
5m-3+6m=9m+5
11m-3=9m+5
11m-9m=5+3
2m=8
m=8/2
m=4
Ejercicio 4:
16-(-2x - 4) - ( 5 x - 3x + 2 ) = -4-(-8x+2)
16+2x-4x-5x-3x+2=-4+8x+2
16-2x-8x+2=-2+8x
16-10x+2=-2+8x
18-10x=-2+8x
18+2=8x+10x
20=18x
20/18=x
1.11111111111=x