SOLUTION: I am lost on this one Solve the system by addition or substitution. 20x – 5y = –12 y = 4x + 3 A) (3, 4) B) (-3, -4) C) (3, -4) D) Inconsistent system (No solutio

Algebra ->  Coordinate Systems and Linear Equations  -> Lessons -> SOLUTION: I am lost on this one Solve the system by addition or substitution. 20x – 5y = –12 y = 4x + 3 A) (3, 4) B) (-3, -4) C) (3, -4) D) Inconsistent system (No solutio      Log On


   

Question 92525: I am lost on this one
Solve the system by addition or substitution.
20x – 5y = –12
y = 4x + 3
A) (3, 4) B) (-3, -4) C) (3, -4) D) Inconsistent system (No solution)
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
20x-+5%28+4x+%2B+3%29=+-12 Plug in y = 4x + 3

20x+-20x+-15=+-12 Distribute

20x+-+20x=+-12%2B15 Add 15 to both sides

0=+3 Combine like terms. Since this is never true for any x, there are no solutions.

So the system is inconsistent. This means the answer is D)