Question

a)2x-7=17
b) y-4=3y+8
c) 5n+3=2n-15
d)9x+15=3x+39
e) 3n+6=36
f) 5m-12=m+3
g) 7y-3=18
h) 3n+2n=n-28
i) 8x-4=104
se puderem coloca o calculo tbm ajuda bastante, mais se nao der nao tem problema

Answer 1

Resposta:

a)

$2x-7=17\\2x=17+7\\2x=24\\x=\frac{24}{2}\\\x= 12$

b)

$y-4=3y+8\\-2y= 12 (-1)\\2y=12\\y= \frac{-12}{2} \\\\\y= -6$

c)

$5n+3=2n-15\\3n= -18\\n= \frac{-18}{3}\\\\n= -6$

d)

$9x+15=3x+39\\9x - 3x= 39 - 15\\6x= 24\\x= \frac{24}{6} \\\\x= 4$

e)

$3n+6=36\\3n = 30\\n= \frac{30}{3}\\\\n= 10$

f)

$5m-12=m+3\\4m= 15\\m= \frac{15}{4}$

g)

$7y-3=18\\7y= 21\\y= \frac{21}{7} \\\\y= 3$

h)

$3n+2n=n-28\\4n = -28\\n= \frac{-28}{4}\\\\n= -7$

i)

$8x-4=104\\8x = 108\\x = \frac{108}{8}\\\\x= \frac{27}{2}$

ajudei? de nada :)