Respuesta :
a - 2b + 3c - (a - 2b -3c + d)
Note that the exercise is asking for the negative form of the 2º equation, so we need to multiply it by (-1)
a - 2b + 3c - a + 2b + 3c - d
simplify the equation
(a - a) + ( 2b - 2b) + (3c + 3c) + (-d)
6c - d
B.
Note that the exercise is asking for the negative form of the 2º equation, so we need to multiply it by (-1)
a - 2b + 3c - a + 2b + 3c - d
simplify the equation
(a - a) + ( 2b - 2b) + (3c + 3c) + (-d)
6c - d
B.