Explicación paso a paso:
5x+7=12
5x=12-7
5x=5
x=5/5
x=1
5-x=x-3
x=-8
2x=-x+9
×=9
-4x+9=x-1
-3x=8
x=-2.67
-2x+1=-7
-2x=-6
x=3
-4-2x=2-x
x=-2
4x-16=x-1
3x=15
x=5
2x-1-2x=0
4x=-1
x=-0.25
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Explicación paso a paso:
5x+7=12
5x=12-7
5x=5
x=5/5
x=1
5-x=x-3
x=-8
2x=-x+9
×=9
-4x+9=x-1
-3x=8
x=-2.67
-2x+1=-7
-2x=-6
x=3
-4-2x=2-x
x=-2
4x-16=x-1
3x=15
x=5
2x-1-2x=0
4x=-1
x=-0.25