Question

Sendo f(x)= -10x +100, calcule f(x)= -100

Answer 1

$f(x) = -10x + 100\\f(x) = -100\\-100 = -10x + 100\\-100 - 100 = -10x\\-200 = -10x\\200 = 10x\\x = \frac{200}{10}\\ x = 20$