Question

Se A=2x+4y+5,B =2x+2y-3 e C =+4x-y+4, entao A-B+C é igual a :

A, x+y+8
B, x+2y+4
C, 2y+8
D, 4x+4y+2
E, 4x+y+12

Answer 1

A-B+C =(2x+4y+5)-(2x+2y-3)+(4x-y+4)

=2x-2x+4x+4y-2y-y+5+3+4

=4x+y+12

letra(e)