Question

d)2.(3x-1)+2.(3x)=0
f)2.(3-y)+7.(2-y)=15-4y

Answer 1

Olá Antonella,

i)
2.(3x - 1) + 2.(3x)=0
6x - 2 + 6x=0
6x + 6x= 2
12x=2
x=2/12
x=1/6.


ii)
2.(3-y)+7.(2-y)=15-4y
6 - 2y + 14 - 7y = 15 - 4y
-2y - 7y + 4y = 15 - 14 - 6
-5y= -5 (-1)
5y=5
y=5/5
y=1.


Espero ter ajudado!