Question

a) 9x - 4=5
b) 12+2x=6
c) 6x+10= -18
d) 9x - 9= -90
e) 3x+2= 20
f) x - 4x= 3

ayuda

Answer 1

Respuesta:

$a)9x - 4 = 5 \\ 9x = 5 + 4 \\ 9x = 9 \\ x = \frac{9}{9} \\ x = 1$

$b)12 + 2x = 6 \\ 2x = 6 - 12 \\ 2x = - 6 \\ x = - \frac{6}{2} \\ x = - 3$

$c)6x + 10 = - 18 \\ 6x = - 18 - 10 \\ 6x = - 28 \\ x = - \frac{28}{6} \\ x = - \frac{14}{3}$

$d)9x - 9 = - 90 \\ 9x = - 90 + 9 \\ 9x = - 81 \\ x = - \frac{81}{9} \\ x = - 9$

$e)3x + 2 = 20 \\ 3x = 20 - 2 \\ 3x = 18 \\ x = \frac{18}{3} \\ x = 6$

$f)x - 4x = 3 \\ - 3x = 3 \\ x = \frac{3}{ -3 } \\ x = - 1$