Respuestas
Respuesta:
6) x = -7
7) x = 14/3 = 4.6667
8) x = 1
Explicación paso a paso:
6
2-(3-2(x+1)) = 3x+2(x-(3 +2x))
2-(3-(2*x + 2*1)) = 3x + 2(x -3 - 2x)
2-(3-(2x + 2)) = 3x + (2*x + 2*-3 + 2*-2x)
2-(3 - 2x - 2) = 3x + 2x - 6 - 4x
2 - 3 + 2x + 2 = 3x + 2x - 4x - 6
2 - 3 + 2 + 6 = 3x + 2x - 4x - 2x
7 = -x
x = -7
Comprobación:
2-(3-2(-7+1)) = 3*-7+2(-7-(3+2*-7))
2-(3-2(-6)) = -21 + 2(-7-(3-14))
2-(3+12) = -21 + 2(-7-(-11))
2-(15) = -21 + 2(-7+11)
2-15 = -21 + 2(4)
-13 = -21+8
7
3(x+1)-2x = x-(2+3(3-x))
(3*x + 3*1) - 2x = x - (2 + (3*3 + 3*-x))
3x + 3 - 2x = x - (2 + 9 - 3x)
3x - 2x + 3 = x - (11 - 3x)
x + 3 = x - 11 + 3x
3 + 11 = x + 3x - x
14 = 3x
x = 14/3 = 4.6667
Comprobación:
3(4.6667+1) - 2*4.6667 = 4.6667 - (2+3(3-4.6667))
3*5.6667 - 2*4.6667 = 4.6667 - (2+3*-1.6667)
17 - 9.3333 = 4,6667 - (2-5)
7.6667 = 4.6667 - (-3)
7.6667 = 4.6667 + 3
8
1 - 2(1+3x-2(x+2)+3x) = -1
1 - 2(1+3x-(2*x + 2*2) + 3x) = -1
1 - 2(1+3x-(2x+4) + 3x = -1
1 - 2(1+3x -2x-4 + 3x) = -1
1 - 2(3x-2x+3x+1-4) = -1
1 - 2(4x-3) = -1
1 - (2*4x + 2*-3) = -1
1 - (8x - 6) = -1
1 - 8x + 6 = -1
-8x = -1 -1 -6
-8x = -8
x = -8/-8
x = 1
Comprobación:
1 - 2(1 + 3*1 - 2(1+2) + 3*1) = -1
1 - 2(1 + 3 - 2(3) + 3) = -1
1 - 2(1 + 3 - 6 + 3) = -1
1 - 2(1) = -1
1-2 = -1