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4x=2x₊2
4x-2x=2
2x=2
x=2/2
x=1
Rpta: x=1
x + 3x = 2x + 2
4x = 2x + 2
4x - 2x = 2
2x = 2
x = 2/2
x = 1
Comprobacion
x + 3x = 2x + 2
1 + 3 * 1 = 2* 1 + 2
1 + 3 = 2 + 2
4 = 4