SOLUTION: c. 4x + y =17, 2x + 3y=21 d. 18x + y=42,6x-3y=-6 Please help I am having a brain cramp

Algebra ->  Coordinate Systems and Linear Equations  -> Lessons -> SOLUTION: c. 4x + y =17, 2x + 3y=21 d. 18x + y=42,6x-3y=-6 Please help I am having a brain cramp      Log On


   

Question 174589: c. 4x + y =17, 2x + 3y=21
d. 18x + y=42,6x-3y=-6
Please help I am having a brain cramp
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
c. 4x + y =17 or y=-4x+17 (red line)
2x + 3y=21 or 3y=-2x+21 or y=-2x/3+21/3 or y=-2x/3+7 (green line).
+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+-4x+%2B17%2C+-2x%2F3+%2B7%29+ (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions -4x +17 and -2x/3 +7).
ANSWER (3,5)
d. 18x + y=42 or y=-18x+42 (red line)
6x-3y=-6 or -3y=-6x-6 or y=-6x/-3-6/-3 or y=2x+2 (green line).
+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+50%2C+-18x+%2B42%2C+2x+%2B2%29+ (graph 300x200 pixels, x from -6 to 5, y from -10 to 50, of TWO functions -18x +42 and 2x +2).
ANSWER (2,6)