Question

Seja A = 2x + 4y + 5, B = 2x + 2y - 3 e C =
4x – y + 4, determine o valor de A + B – C

Answer 1

-2x + 4y +5 - (2x +2y -3) + 4x -y +4

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

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

-4x +4x +y +12

y +12