SOLUTION: I need help very fast!! For my Algebra Homework!! I also have a test on this tomorrow!! Linear Systems using Substituion: y = 2x - 1 2x + y = 3 ___________ PLEASE EXPLAI

Algebra ->  Linear-equations -> SOLUTION: I need help very fast!! For my Algebra Homework!! I also have a test on this tomorrow!! Linear Systems using Substituion: y = 2x - 1 2x + y = 3 ___________ PLEASE EXPLAI      Log On


   

Question 718177: I need help very fast!! For my Algebra Homework!! I also have a test on this tomorrow!!
Linear Systems using Substituion:
y = 2x - 1
2x + y = 3
___________
PLEASE EXPLAIN HOW YOU DID EVERYTHING AND WHY STEP-BY-STEP

THANKS!!
Answer by kngt(2) About Me  (Show Source):
You can put this solution on YOUR website!
Your question is
y=2x-1 - equation (1)
2x+y=3 - equation (2)
Rearrange equ (1)to form
y=2x-1 ---> 2x-y-1=0 ----> 2x-y=1 - equation (3)
Add (2) and (3)
4x=4 ---> x=1
Put x=1 in equ (2)
2*1+y=3
y=3-2
y=1