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4x + 3x - 6 = 56 - 7x - 4
7x - 6 = 52 - 7x
7x + 7x = 52 + 6
14x = 58
x = 58/14
x = 29/7
El valor de x es 29/7
4x+3*(x-2)=7*(8-x)-4
Aplicamos la propiedad distributiva en ambos lados y luego reducimos terminos semejantes:
4X^2 - 8x + 3x = 56 - 7x - 4
4x^2 - 5x = 52 -7x
4x^2 = 52 - 7x + 5x
4x^2 = 52 - 2x
x^2 = 52 - 2x / 4
x^2 = 13 - 1/2x
x^2 - 1/2x = 13
x - 1/2x = √13
1/2x = √13
x = √13/1/2
x = 3.60 / 0.5
x = 7.2