Solve using elimination.
-7x – 5y = 5
-9x – 5y = 15
2 answers:
Eliminate y's
multiply 2nd eqution by -1 and add to 2nd
-7x-5y=5
<u>9x+5y=-15 +</u>
2x+0y=-10
2x=-10
divide 2
x=-5
sub back
-9x-5y=15
-9(-5)-5y=15
45-5y=15
minus 45 bot sides
-5y=-30
divide both sides by -5
y=6
x=-5
y=6
(x,y)
(-5,6)
-7x-5y=5
-(-9x-5y)=15 It's minus because negative times negative = positive
2x=-10
x= -5
-7(-5) - 5y = 5
35-5y =5
-5y = -30
y=6
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