Question

can someone help me with geometry please

Answer 1

Add 8v to both sides. you get, 1-7v-8v+8v=-8v-8v+8v. The 8v cancels out and you then get, 1-7v=-8v. Add 7v to both sides. 1-7v+7v=-8v+7v. then you get, 1=-1v. divide by -1 and you get v=-1

Answer 2

1-7v-8v=-8v-8v
1 = -8v -8v +8v +7v
1 =-1v
v = 1/-1
v=-1