Question

Inequação do (1º) Primeiro Grau

5x-9(2-x)>0

Answer 1

5x - 9(2 - x) > 0
5x - 18 + 9x > 0
14x - 18 > 0
14x > 18
x > 18/14
x > 9/7

BONS ESTUDOS!

Answer 2

$Resolu\c{c}\~ao \to \left\{\begin{array}{ccc}5x-9*(2-x)>0\\\\5x-18+9x>0\\\\14x>18\\\\x>\frac{18}{14} >\frac{9}{7}\\\\\boxed{\boxed{S=\{x \in\ \mathbb{R}|x>\frac{9}{7}\}}}\end{array}\right$

Espero ter ajudado. =^.^=