Question

Dada a funçao f(×)= -2×+20, calcule o valor de x para o qual se tem f(×)=0

Answer 1

$- 2x + 20 = 0$
$x = ( - 20 \div - 2)$
$x = 10$

Answer 2

$0 = - 2x + 20$
$2x = 20$
$x = 10$