−1−2v=−6v−19+2v−1−2v=−6v−19+2v is also the same as
−1color(pink)+−2v=−6vcolor(pink)+−19+2v−1+−2v=−6v+−19+2v. It is also the same as
color(pink)2color(pink)vcolor(pink)-color(pink)1=−6v+color(pink)2color(pink)vcolor(pink)+color(pink)(-19)2v−1=−6v+2v+−19
So,
−2v−1=color(pink)((−6v+2v))+−19−2v−1=(−6v+2v)+−19
Which is also
−2v−1=color(pink)−color(pink)4color(pink)v+−19−2v−1=−4v+−19
−2v−1=−4vcolor(pink)−19−2v−1=−4v−19
Then we will add 4v4v to both sides.
−2v−1color(pink)+color(pink)4color(pink)v=−4v−19color(pink)+color(pink)4color(pink)v−2v−1+4v=−4v−19+4v
So,
2v−1=−192v−1=−19
Then we add 11 to both sides.
2v−1color(pink)+color(pink)1=−19color(pink)+color(pink)12v−1+1=−19+1
That means 2v=−182v=−18
Divide both sides by 22
:. v=-9
