Question

Resolva as equações
a) 6x+x=14
b)x+7=0
c)7x+1-5x=9
d)21x+1=11x+6

Answer 1

a)
$6x + x = 14 \\ 7x = 14 \\ x = \frac{14}{3} \\ x = 4.6$
b)
$x + 7 = 0 \\ x = - 7 + 0 \\ x = - 7$
c)
$7x + 1 - 5x = 9 \\ 7x - 5x = 9 - 1 \\ 2x = 8 \\ x = \frac{8}{2} \\ x = 4$

d)
$21x + 1 = 11x + 6 \\ 21x - 11x = - 1 + 6 \\ 11x = 5 \\ x = \ \frac{5}{11} \\ x = 0.45$
Espero ter ajudado