SOLUTION: USE THE SUBSTITUTION METHOD OR LINEAR COMBINATION TO SOLVE THE LINEAR SYSTEM AND TELL HOW MANY SOLUTIONS THE SYSTEM HAS. THEN DESCRIBE THE GRAPH OF THE SYSTEM. 24) -7X+7Y=7

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: USE THE SUBSTITUTION METHOD OR LINEAR COMBINATION TO SOLVE THE LINEAR SYSTEM AND TELL HOW MANY SOLUTIONS THE SYSTEM HAS. THEN DESCRIBE THE GRAPH OF THE SYSTEM. 24) -7X+7Y=7       Log On


   

Question 120332This question is from textbook
: USE THE SUBSTITUTION METHOD OR LINEAR COMBINATION TO SOLVE THE LINEAR SYSTEM AND TELL HOW MANY SOLUTIONS THE SYSTEM HAS. THEN DESCRIBE THE GRAPH OF THE SYSTEM.
24) -7X+7Y=7
2X-2Y=-18
25)2X+4Y=-8
2X+2Y=-4
26)2X+Y=-4
4X-2Y=8 This question is from textbook

Answer by checkley71(8403) About Me  (Show Source):
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24)
-7X+7Y=7 OR 7Y=7X+7 OR Y=7X/7+7/7 OR Y=X+1 (RED LINE)
2X-2Y=-18 OR -2Y=-2X-18 OR Y=-2X/-2-18/-2 OR Y=X+9 (GREEN LINE)
+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+y+=+x+%2B1%2C+y+=+x+%2B9%29+ (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions y = x +1 and y = x +9).
ZERO SOLUTIONS
25)
2x+4y=-8 or 4y=-2x-8 or y=-2x/4-8/4 or y=-x/2-2 (red line)
2x+2y=-4 or 2y=-2x-4 or y=-2x/2-4/2 or y=x-2(green line)
+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+y+=+-x%2F2+-2%2C+y+=+x+-2%29+ (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions y = -x/2 -2 and y = x -2).
SOLUTION(0,-2)
26)
2x+y=-4 or y=-2x-4 (red line)
4x-2y=8 or -2y=-4x+8 or y=-4x/-2+8/-2 or y=2x-4(green line)
+graph%28+300%2C+200%2C+-6%2C+5%2C+-10%2C+10%2C+y+=+-2x+-4%2C+y+=+2x+-4%29+ (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions y = -2x -4 and y = 2x -4).
SOLUTION(0,-4)