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4x-2x=-3+9
2x=3
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(5x/2)+2=20+2
(5x/2)=20+2-2
5x = 2(20)
x=40/5
x=8
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3x/4=24
3x=24*4
x=96/3
x=32
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4x+5=2x-7
4x-2x=-5-7
2x=-12
x=-12/2
x=-6
los otros puntos no se alcanzaban a ver completos