Question

Resolva as equações:
a)5x - 3 = 2x + 9
b) 3x - 5 = 13
c) 7x-1=13

Answer 1

Resposta:

$a)5x - 3 = 2x + 9$

$5x-2x=9+3$

$3x=12$

$x=12/3$

$x=4$

$b) 3x - 5 = 13$

$3x=13+5$

$3x=18$

$x=18/3$

$x=6$

$c) 7x-1=13$

$7x=13+1$

$7=14$

$x=14/7$

$x=2$