Question

3x – 4y + 12 – ( 3x – 4y + 10 ) – ( 4x – 3y – 3 ) é:

a) 10x+3y+5 b) -4x+3y+5 c) 10x-3y-5 d) 2x+11y+5

Answer 1

Nenhuma dessas alternativas

$3x – 4y + 12 – ( 3x – 4y + 10 ) – ( 4x – 3y – 3 ) \\ 3x - 4y + 12 - 3x + 4y - 10 - 4x + 3y + 3 \\ 5 - 4x + 3y$