Question

calcule o valor de x na inequação 5x - 1 < 19
A)X < 1 ( )
B)X < 4 ( )
C)X < 3 ( )
D)X < 2 ( )
C)X < 0 ( )​

Answer 1

Resposta:

alternativa: B)X < 4

$\huge \rm \to{conta \: armada {\leftarrow}} \\ \huge \boxed{ \begin{array}{c} \rm5x -1 < 19 \\ \rm 5x < 19 + 1 \\ \rm5x < 20 \\ \rm{x < 20 \div 5} \\ \rm{x < 4} \\ \end{array}}$