Question

Dados A = 7x + 3 B = - 4x + 3 C = 6x + 3 e D = 2x - 1 calcule A - B + C - D

Answer 1

Bom dia

A = 7x + 3
B = - 4x + 3
C = 6x + 3 
D = 2x - 1

calcule A - B + C - D

7x - (-4x + 6x - 2x = 15x
3 - 3 + 3 - (-1) = 4

A - B + C - D = 15x + 4