Respuestas
Respuesta dada por:
0
3x + 1 = -12
3 x = -12 - 1
3x = -13 .. x = -13/3
B
2x + ( x - 1 ) = 11
2x -x - 1 = 11 :: x = 10
C.
x/3 + 4 - (x + 1) = -3
x/3 - x + 4 - 1 = -3
-2x/3 = -3 +1 - 4 = -6 :: x = 6.3/2 = -9
Y si fuese el triple del consecutivo?
3 (x + 1) = -12
3x + 3 = -12
3x = - 15 :: x = - 5
D.
(3.x - 5) + (x - 1) = 3x - 5 + x - 1 = 6
4 x = 6 + 6 = 12 :: x = 3
E.
2(x + 1) - (x-1) = 8
2x + 2 - x + 1 = x + 3 :: x = 8 - 3 = 5
F
(x+1) . 7 = (x+1) 19 :
7x +7 = 19x + 19
7x - 19x = 19 - 7 :: -12x = 12 :: x = -1
3 x = -12 - 1
3x = -13 .. x = -13/3
B
2x + ( x - 1 ) = 11
2x -x - 1 = 11 :: x = 10
C.
x/3 + 4 - (x + 1) = -3
x/3 - x + 4 - 1 = -3
-2x/3 = -3 +1 - 4 = -6 :: x = 6.3/2 = -9
Y si fuese el triple del consecutivo?
3 (x + 1) = -12
3x + 3 = -12
3x = - 15 :: x = - 5
D.
(3.x - 5) + (x - 1) = 3x - 5 + x - 1 = 6
4 x = 6 + 6 = 12 :: x = 3
E.
2(x + 1) - (x-1) = 8
2x + 2 - x + 1 = x + 3 :: x = 8 - 3 = 5
F
(x+1) . 7 = (x+1) 19 :
7x +7 = 19x + 19
7x - 19x = 19 - 7 :: -12x = 12 :: x = -1
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