Question

Atividade de Matemática:
Montar conta​

Answer 1

Resposta:

a)

$2x + 1 > 7 \\ \\ 2x > 7 - 1 \\ \\ 2x > 6 \\ \\ x > \dfrac{6}{2} \\ \\ \LARGE\boxed{ \bf \green{x > 3}}$

b)

$2x + 5 < 15 \\ \\ 2x < 15 - 5 \\ \\ 2x < 10 \\ \\ x < \dfrac{10}{2} \\ \\ \LARGE\boxed{ \bf \green{ x < 5}}$

c)

$5x - 1 \geqslant 9 \\ \\ 5x \geqslant 9 + 1 \\ \\ 5x \geqslant 10 \\ \\ x \geqslant \dfrac{10}{5} \\ \\ \LARGE\boxed{ \bf \green{ x \geqslant 2}}$

d)

$3x - 9 < 9 \\ \\ 3x < 9 + 9 \\ \\ 3x < 18 \\ \\ x < \dfrac{18}{3 } \\ \\ \LARGE\boxed{ \bf \green{x < 6}}$

e)

$7 - 3x \geqslant - 2 \\ \\ 7 + 2 \geqslant 3x \\ \\ 9 \geqslant 3x \\ \\ x \leqslant \dfrac{9}{3} \\ \\ \LARGE \boxed{ \bf \green{x \leqslant 3}}$

$\LARGE\boxed{ \bf \blue{ \underline{Bons \: Estudos!}}}$