Question

Se x = 8 e y = -3, DETERMINE o valor da expressão 3·(x – 9) + 2y.

Answer 1

$= 3(x - 9) + 2y$

$\boxed{x = 8 \: \: e \: \: y = - 3}$

$= 3(8 - 9) + 2 \: . \: ( - 3)$

$= 3 \: . \: ( - 1) + 2 \: . \: ( - 3)$

$= 3 \: . \: ( - 1) - 6$

$= - 3 - 6$

$\boxed{ = - 9}$

Att. NLE Top Shotta