Question

b. 2 - x = 6x - 12
c. -3x + 9 = -3 + 2x - 8
d. -7x + 11 + 4x - 8 = -18
e. 5. (x - 2) = 3x + 8
f. 6. (x + 5) - 5x = 25
g. 5. (x – 3) = 4.(x + 4)
h.-3. (x - 1) + 4 = 6.(x - 1) - 5
i. 4. (x + 3) - (x + 2) = (x - 30): (-1)
j. -3.(2 - x) = (4x + 2): 2
no pongan boludeses xq reporto y hackeo​

Answer 1

Respuesta:

b)

$2 - x = 6x - 12\\-x-6x=-12-2\\-7x=-14\\x=-14:(-7)\\x=2$

c)

$-3x + 9 = -3 + 2x - 8\\-3x-2x=-3-8-9\\-5x= -(3+8+9)\\-5x=-20\\x=-20:(-5)\\x=4$

d)

$-7x + 11 + 4x - 8 = -18\\-3x+3= -18 \\-3x=-18-3\\-3x=-(18+3)\\-3x=-21\\x=-21:(-3)\\x=7$

e)

$5. (x - 2) = 3x + 8\\5x-5.2=3x+8\\5x-10=3x+8\\5x-3x=8+10\\2x=18\\x=18:2\\x=9$

f)

$6. (x + 5) - 5x = 25\\6x+6.5-5x=25\\6x+30-5x=25\\6x-5x=25-30\\x=-5:(+1)\\x=-5$

g)

$5. (x-3) = 4.(x + 4)\\5x-5.3=4x+4.4\\5x-15=4x+16\\5x-4x=-16+15\\x=-(16-15)\\x=-1$

h)

$-3. (x - 1) + 4 = 6.(x - 1) - 5\\-3x-(-3).1+4=6x-6.1-5\\-3x-(-3)+4=6x-6-5\\-3x+3+4=6x-11\\-3x+7=6x-11\\-3x-6x=-11-7\\-9x=-18\\x=-18(-9)\\x=2$

i)

$4. (x + 3) - (x + 2) = (x - 30): (-1)\\4x+4.3-x-2=x-30\\3x+10=x-30\\3x-x=-30-10\\2x=-40\\x=-40:(+20)\\x=-20$

j)

$-3.(2 - x) = (4x + 2): 2\\-3.2-(-3).x=4x:2+2:2\\-6+3x=2x+1\\3x-2x=1+6\\x=7:1\\x=7$

Espero haberte ayudado, saludos :)