Question

1- Encontre o valor de x nas equações:
a) x + 5 = 21 X=_____

c) 2x + 3 = 5 + 6 X=______​

Answer 1

Oie, Td Bom?!

a)

$x + 5 = 21$

$x = 21 - 5$

$\boxed { x = 16}$

b)

$2x + 3 = 5 + 6$

$2x + 3 = 11$

$2x = 11 - 3$

$2x = 8$

$x = \frac{8}{2}$

$\boxed {x = 4}$

Att. Makaveli1996

Answer 2

$\sf a) \Rightarrow \: x + 5 = 21\\ \sf \: x = 21 - 5 \\ \sf - 20x = 5 \\ \red{ \sf \: x = 16}$

$\sf c \Rightarrow2x + 3 = 5 + 6 \\ \sf2x = 5 + 6 - 3 \\ \sf2x = 8 \\ \sf \: x = 8/2 \\ \sf \red{x = 4}$

Att. C6bolinha.