Explicación paso a paso:
1.
x+x+x=29
3x=29
x=23
2.
6x+18=10x+2
x=4
3.
4x+1=x+4
x=1
4.
x+x+x+x+x=20
5x=20
5.
5x-5=6x-9
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Explicación paso a paso:
1.
x+x+x=29
3x=29
x=23
2.
6x+18=10x+2
x=4
3.
4x+1=x+4
x=1
4.
x+x+x+x+x=20
5x=20
x=4
5.
5x-5=6x-9
x=4