Respuesta:
7x+{–4x+(–x+8)}=6+{(3x+9)}
7x+{-4x-x+8} = 6+3x+9
7x-4x-x-8 = 15 + 3x
2x -8 = 15+ 3x
-23 = x
espero que te ayude
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Respuesta:
7x+{–4x+(–x+8)}=6+{(3x+9)}
7x+{-4x-x+8} = 6+3x+9
7x-4x-x-8 = 15 + 3x
2x -8 = 15+ 3x
-23 = x
espero que te ayude