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4x = 10 + 5
4x = 15
x = 15/4
2 - 3x = 2
-3x = 2 - 2
-3x = 0
x = 0
2 = 2x
2x = 2
x = 2/2
x = 1
5x = 10
x = 10/5
x = 2
4 + 7x = 10
7x = 10 - 4
7x = 6
x = 6/7
-2x - 5 = 3
-2x = 3 + 5
-2x = 8
2x = -8
x = -8/2
x = -4
Suerte, no te olvides de calificar
5/4
0
2
6/7
-8/2=-4