Question

Hey guys, anyone know the answer to these?

What is the solution of the equation?
2.8 = 2y

A. 1/4
B. 1/2
C. 2.8
D. 0.6

What is the solution of the equation?
-9 = 5/7n

A. -153/5
B. -5/153
C. -17/45
D. -45/17

Answer 1

The solution is none of those, the solution for y would be 1.4

Answer 2

This is incorrect, there is no right answer.
You would divide both sides by 2
2.8=2y
2.8/2=y
1.4=y

The second one is also incorrect.
-9 = 5/7n
-9/(5/7)=n
-12.6 or -63/5=n

Answer 3

When you have a number on one side and a veritable (letter) and a number on another, you always want to get the letter by itself. You do this by dividing the number on both sides.

Answer 4

Okay, I get what your saying, Thank you:)

Answer 5

No problem :)

Answer 6

2.8 = 2y
y = \(\frac{ 7 }{ 5 } = 1.4\)

Answer 7

Thank you some_someone and alexisjm1, y'all were helpful too:)