Respuesta:
a) 2
b) 28
Explicación paso a paso:
a) 4 – x – 2(x + 1) = – 2x
4 − x − 2x − 2 = −2x
4 − 3x − 2 = − 2x
2 − 3x = − 2 x
2 − 3x + 2x = 0
2 − x = 0
-x = -2
x = 2
b) 3 ( 3x + 1 ) – ( x – 1 ) = 6 ( x + 10 )
9x + 3 − ( x − 1 ) = 6 ( x + 10 )
9x + 3 − x − ( −1 ) = 6 ( x + 10 )
9x + 3 − x + 1 = 6 ( x + 10 )
8x + 3 + 1 = 6 ( x + 10 )
8x + 4 = 6 ( x + 10 )
8x + 4 = 6x + 60
8x + 4 − 6x = 60
2x + 4 = 60
2x = 60 − 4
2x = 56
x = 56/2
x = 28
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Respuesta:
a) 2
b) 28
Explicación paso a paso:
a) 4 – x – 2(x + 1) = – 2x
4 − x − 2x − 2 = −2x
4 − 3x − 2 = − 2x
2 − 3x = − 2 x
2 − 3x + 2x = 0
2 − x = 0
-x = -2
x = 2
b) 3 ( 3x + 1 ) – ( x – 1 ) = 6 ( x + 10 )
9x + 3 − ( x − 1 ) = 6 ( x + 10 )
9x + 3 − x − ( −1 ) = 6 ( x + 10 )
9x + 3 − x + 1 = 6 ( x + 10 )
8x + 3 + 1 = 6 ( x + 10 )
8x + 4 = 6 ( x + 10 )
8x + 4 = 6x + 60
8x + 4 − 6x = 60
2x + 4 = 60
2x = 60 − 4
2x = 56
x = 56/2
x = 28