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Ecuaciones de 1°er grado.
4x = 28
x = 28/4
x = 7
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2x - 7 = 9
2x = 9 + 7
2x = 16
x = 16/2
x = 8
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6x - 5 = - x + 15
6x + x = 15 + 5
7x = 20
x = 20/7
............................................................................
7x - 11 = 6 - 10x
7x + 10x = 6 + 11
17x = 17
x = 17/17
x = 1
......................................................................
5(x - 8) = 0
5x - 40 = 0
5x = 40
x = 40/5
x = 8
.......................................................................
2(x + 4) = x
2x + 8 = x
2x - x = 8
x = 8
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