Hi Brainiac
Distribute
(5)(y)+(5)(-4)=(7)(2y)+(7)(1)
5y-20=14y+7
Now we need to subtract 14y from both sides
5y-20-14y=14y+7-14y
-9y-20=7
Now add 20
-9y-20+20=7+20
-9y=27
Divide both sides by -9 to both sides so we can find the value for y
-9y/-9= 27/-9
y= -3
I hope that's help:0
Good night
