SOLUTION: Express each equation in slope-intercept form. Without graphing the equstions, state whether the system of eqations has exactly one solution, no solution, or an infinite number of

Question 241408: Express each equation in slope-intercept form. Without graphing the equstions, state whether the system of eqations has exactly one solution, no solution, or an infinite number of solutions.
x + 4y = -5
4x + 16y = -20
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
x + 4y = -5 multiply by 4
4x+16y=-20
4x+16y=-20
These 2 equation s are idnetical therefore there are an infinite number of solutions.
EX:
x=0
0+16y=-20
y=-20/16
y=-5/4 (0,-5/4)
-----------------
y=0
x+0=-20
x=-20 (-20,0)
----------------
x=3
4*3+16y=-20
12+16y=-20
16y=-20-12
16y=-32
y=-32/16
y=-2 (3,-2)
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