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=> A=8x
B=10x-2A+9x
B=10x-2(8x)+9x
B=10x-16x+9x
=> B=3x
=>A-2B-2x
8x-2(3x)-2x
8x-6x-2x
0<======respuesta d)
A: 8x B: 19x- 16x
B: 3x
.: 8x - 6x - 2x = 0
d) 0