SOLUTION: 1a) solve algebraically these simultaneous equations 3x-y=1 x+2y=12 B) 14x+3y=1 4x-y=4 C)2x+5y=1 3x+2y=7

Algebra ->  Equations -> SOLUTION: 1a) solve algebraically these simultaneous equations 3x-y=1 x+2y=12 B) 14x+3y=1 4x-y=4 C)2x+5y=1 3x+2y=7      Log On


   

Question 1085489: 1a) solve algebraically these simultaneous equations
3x-y=1 x+2y=12
B) 14x+3y=1 4x-y=4
C)2x+5y=1 3x+2y=7
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
1.3x-y=1
2.x%2B2y=12
From 2,
x=-2y%2B12
So,
3x=-6y%2B36
Substituting into 1,
-6y%2B36-y=1
-7y=-35
y=5
Now use either equation to solve for x.
Use the same method for the other two systems of equations.