Explicación paso a paso:
1) 5x = 20
x = 4
2) 2+ 4x = 18
4x = 16
3) 5 + 6x = 23
6x = 18
x = 3
4) 8x -5 = 5x + 16
3x = 21
x = 7
5) 8x -18 = 3x + 102
5x = 120
x = 24
6) 4x + 28 = 94 + x
3x = 66
x = 22
7) 4x + 45 = 46 + 3x
x = 1
8) 42 + 9x + 4 = 82 + 7x
46 + 9x = 82 + 7x
2x = 36
x = 18
espero haberte ayudado
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Explicación paso a paso:
1) 5x = 20
x = 4
2) 2+ 4x = 18
4x = 16
x = 4
3) 5 + 6x = 23
6x = 18
x = 3
4) 8x -5 = 5x + 16
3x = 21
x = 7
5) 8x -18 = 3x + 102
5x = 120
x = 24
6) 4x + 28 = 94 + x
3x = 66
x = 22
7) 4x + 45 = 46 + 3x
x = 1
8) 42 + 9x + 4 = 82 + 7x
46 + 9x = 82 + 7x
2x = 36
x = 18
espero haberte ayudado